Update version to v1.4.248 and commit

Preserve PR Numbers During Version Cache Merges

.github/ISSUE_TEMPLATE/bug.yml

@@ -7,29 +7,74 @@ body:
     attributes:
       value: |
         Thanks for taking the time to fill out this bug report!
+        Please provide as much detail as possible to help us understand and reproduce the issue.
+
   - type: textarea
     id: what-happened
     attributes:
       label: What happened?
       description: Also tell us, what did you expect to happen?
       placeholder: Tell us what you see!
-      value: "I was doing THIS, when THAT happened. I was expecting THAT_OTHER_THING to happen instead."
+      value: "Please provide all the steps to reproduce the bug. I was doing THIS, when THAT happened. I was expecting THAT_OTHER_THING to happen instead."
     validations:
       required: true
-  - type: checkboxes
+
+  - type: dropdown
+    id: os
+    attributes:
+      label: Operating System
+      options:
+        - macOS - Silicon (arm64)
+        - macOS - Intel (amd64)
+        - Linux - amd64
+        - Linux - arm64
+        - Windows
+    validations:
+      required: true
+
+  - type: textarea
+    id: os-version
+    attributes:
+      label: OS Version
+      description: Please provide details about your OS version by running one of the following commands.
+      placeholder: |
+        macOS: `sw_vers`
+        Linux: `uname -a` or `cat /etc/os-release`
+        Windows: `ver`
+      render: shell
+
+  - type: dropdown
+    id: installation
+    attributes:
+      label: How did you install Fabric?
+      description: "Please select the method you used to install Fabric. You can find this information in the [Installation section of the README](https://github.com/ksylvan/fabric/blob/main/README.md#installation)."
+      options:
+        - Release Binary - Windows
+        - Release Binary - macOS (arm64)
+        - Release Binary - macOS (amd64)
+        - Release Binary - Linux (amd64)
+        - Release Binary - Linux (arm64)
+        - Package Manager - Homebrew (macOS)
+        - Package Manager - AUR (Arch Linux)
+        - From Source
+        - Other
+    validations:
+      required: true
+
+  - type: textarea
     id: version
     attributes:
-      label: Version check
-      description: Please make sure you were using the latest version of this project available in the `main` branch.
-      options:
-        - label: Yes I was.
-          required: true
+      label: Version
+      description: Please copy and paste the output of `fabric --version` (or `fabric-ai --version` if you installed it via brew) here.
+      render: text
+
   - type: textarea
     id: logs
     attributes:
       label: Relevant log output
       description: Please copy and paste any relevant log output. This will be automatically formatted into code, so no need for backticks.
       render: shell
+
   - type: textarea
     id: screens
     attributes:

.github/workflows/ci.yml

@@ -4,13 +4,13 @@ on:
   push:
     branches: ["main"]
     paths-ignore:
-      - 'patterns/**'
-      - '**/*.md'
+      - "data/patterns/**"
+      - "**/*.md"
   pull_request:
     branches: ["main"]
     paths-ignore:
-      - 'patterns/**'
-      - '**/*.md'
+      - "data/patterns/**"
+      - "**/*.md"
 
 jobs:
   test:

.github/workflows/patterns.yaml

@@ -3,7 +3,7 @@ name: Patterns Artifact
 on:
   push:
     paths:
-      - "patterns/**" # Trigger only on changes to files in the patterns folder
+      - "data/patterns/**" # Trigger only on changes to files in the patterns folder
 
 jobs:
   zip-and-upload:
@@ -18,13 +18,13 @@ jobs:
       - name: Verify Changes in Patterns Folder
         run: |
           git fetch origin
-          if git diff --quiet HEAD~1 -- patterns; then
+          if git diff --quiet HEAD~1 -- data/patterns; then
             echo "No changes detected in patterns folder."
             exit 1
           fi
 
       - name: Zip the Patterns Folder
-        run: zip -r patterns.zip patterns/
+        run: zip -r patterns.zip data/patterns/
 
       - name: Upload Patterns Artifact
         uses: actions/upload-artifact@v4

.github/workflows/release.yml

@@ -2,7 +2,7 @@ name: Go Release
 
 on:
   repository_dispatch:
-    types: [ tag_created ]
+    types: [tag_created]
   push:
     tags:
       - "v*"
@@ -69,7 +69,7 @@ jobs:
           GOOS: ${{ env.OS }}
           GOARCH: ${{ matrix.arch }}
         run: |
-          go build -o fabric-${OS}-${{ matrix.arch }} .
+          go build -o fabric-${OS}-${{ matrix.arch }} ./cmd/fabric
 
       - name: Build binary on Windows
         if: matrix.os == 'windows-latest'
@@ -77,7 +77,7 @@ jobs:
           GOOS: windows
           GOARCH: ${{ matrix.arch }}
         run: |
-          go build -o fabric-windows-${{ matrix.arch }}.exe .
+          go build -o fabric-windows-${{ matrix.arch }}.exe ./cmd/fabric
 
       - name: Upload build artifact
         if: matrix.os != 'windows-latest'
@@ -108,10 +108,15 @@ jobs:
           Add-Content -Path $env:GITHUB_ENV -Value "latest_tag=$latest_tag"
 
       - name: Create release if it doesn't exist
+        shell: bash
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          gh release view ${{ env.latest_tag }} || gh release create ${{ env.latest_tag }} --title "Release ${{ env.latest_tag }}" --notes "Automated release for ${{ env.latest_tag }}"
+          if ! gh release view ${{ env.latest_tag }} >/dev/null 2>&1; then
+            gh release create ${{ env.latest_tag }} --title "Release ${{ env.latest_tag }}" --notes "Automated release for ${{ env.latest_tag }}"
+          else
+            echo "Release ${{ env.latest_tag }} already exists."
+          fi
 
       - name: Upload release artifact
         if: matrix.os == 'windows-latest'

.github/workflows/update-version-and-create-tag.yml

@@ -3,13 +3,13 @@ name: Update Version File and Create Tag
 on:
   push:
     branches:
-      - main  # Monitor the main branch
+      - main # Monitor the main branch
     paths-ignore:
-      - 'patterns/**'
-      - '**/*.md'
+      - "data/patterns/**"
+      - "**/*.md"
 
 permissions:
-  contents: write  # Ensure the workflow has write permissions
+  contents: write # Ensure the workflow has write permissions
 
 concurrency:
   group: version-update
@@ -63,14 +63,14 @@ jobs:
 
       - name: Update version.go file
         run: |
-          echo "package main" > version.go
-          echo "" >> version.go
-          echo "var version = \"${{ env.new_tag }}\"" >> version.go
+          echo "package main" > cmd/fabric/version.go
+          echo "" >> cmd/fabric/version.go
+          echo "var version = \"${{ env.new_tag }}\"" >> cmd/fabric/version.go
 
       - name: Update version.nix file
         run: |
           echo "\"${{ env.new_version }}\"" > nix/pkgs/fabric/version.nix
-      
+
       - name: Format source code
         run: |
           nix fmt
@@ -81,7 +81,7 @@ jobs:
 
       - name: Commit changes
         run: |
-          git add version.go
+          git add cmd/fabric/version.go
           git add nix/pkgs/fabric/version.nix
           git add nix/pkgs/fabric/gomod2nix.toml
           git add .
@@ -93,7 +93,7 @@ jobs:
 
       - name: Push changes
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  # Use GITHUB_TOKEN to authenticate the push
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # Use GITHUB_TOKEN to authenticate the push
         run: |
           git push origin main  # Push changes to the main branch
 
@@ -106,7 +106,7 @@ jobs:
 
       - name: Dispatch event to trigger release workflow
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  # Use GITHUB_TOKEN to authenticate the dispatch
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # Use GITHUB_TOKEN to authenticate the dispatch
         run: |
           curl -X POST \
             -H "Authorization: token $GITHUB_TOKEN" \

.gitignore

@@ -131,9 +131,7 @@ celerybeat.pid
 # Environments
 .env
 .venv
-env/
 venv/
-ENV/
 env.bak/
 venv.bak/
 
@@ -349,5 +347,6 @@ web/package-lock.json
 .gitignore_backup
 web/static/*.png
 
-# Local VSCode project settings
-.vscode/
+# Local tmp directory
+.tmp/
+tmp/

.vscode/extensions.json

@@ -0,0 +1,3 @@
+{
+	"recommendations": ["davidanson.vscode-markdownlint"]
+}

.vscode/settings.json

@@ -0,0 +1,144 @@
+{
+	"cSpell.words": [
+		"addextension",
+		"AIML",
+		"anthropics",
+		"badfile",
+		"Behrens",
+		"blindspots",
+		"Bombal",
+		"Cerebras",
+		"compinit",
+		"creatordate",
+		"custompatterns",
+		"danielmiessler",
+		"davidanson",
+		"Debugf",
+		"dedup",
+		"deepseek",
+		"direnv",
+		"dryrun",
+		"dsrp",
+		"editability",
+		"Eisler",
+		"elif",
+		"envrc",
+		"eugeis",
+		"Eugen",
+		"excalidraw",
+		"exolab",
+		"fabriclogo",
+		"fpath",
+		"frequencypenalty",
+		"fsdb",
+		"gantt",
+		"genai",
+		"githelper",
+		"gjson",
+		"GOARCH",
+		"godotenv",
+		"gofmt",
+		"goimports",
+		"gomod",
+		"gonic",
+		"goopenai",
+		"GOPATH",
+		"gopkg",
+		"GOROOT",
+		"Graphviz",
+		"grokai",
+		"Groq",
+		"hackerone",
+		"Haddix",
+		"hasura",
+		"hormozi",
+		"Hormozi's",
+		"HTMLURL",
+		"jaredmontoya",
+		"jessevdk",
+		"Jina",
+		"joho",
+		"ksylvan",
+		"Langdock",
+		"ldflags",
+		"libexec",
+		"listcontexts",
+		"listextensions",
+		"listmodels",
+		"listpatterns",
+		"listsessions",
+		"liststrategies",
+		"listvendors",
+		"lmstudio",
+		"Makefiles",
+		"markmap",
+		"matplotlib",
+		"mattn",
+		"Miessler",
+		"nometa",
+		"numpy",
+		"ollama",
+		"opencode",
+		"openrouter",
+		"otiai",
+		"pdflatex",
+		"pipx",
+		"PKCE",
+		"pkgs",
+		"presencepenalty",
+		"printcontext",
+		"printsession",
+		"pycache",
+		"pyperclip",
+		"readystream",
+		"restapi",
+		"rmextension",
+		"samber",
+		"sashabaranov",
+		"sdist",
+		"seaborn",
+		"semgrep",
+		"sess",
+		"storer",
+		"Streamlit",
+		"stretchr",
+		"talkpanel",
+		"Telos",
+		"Thacker",
+		"tidwall",
+		"topp",
+		"ttrc",
+		"unalias",
+		"unmarshalling",
+		"updatepatterns",
+		"videoid",
+		"webp",
+		"wipecontext",
+		"wipesession",
+		"writeups",
+		"xclip",
+		"yourpatternname"
+	],
+	"cSpell.ignorePaths": ["go.mod", ".gitignore", "CHANGELOG.md"],
+	"markdownlint.config": {
+		"MD004": false,
+		"MD011": false,
+		"MD024": false,
+		"MD025": false,
+		"M032": false,
+		"MD033": {
+			"allowed_elements": [
+				"a",
+				"br",
+				"code",
+				"div",
+				"em",
+				"h4",
+				"img",
+				"module",
+				"p"
+			]
+		},
+		"MD041": false
+	}
+}

README.md

@@ -3,7 +3,7 @@ Fabric is graciously supported by…
 
 [![Github Repo Tagline](https://github.com/user-attachments/assets/96ab3d81-9b13-4df4-ba09-75dee7a5c3d2)](https://warp.dev/fabric)
 
-<img src="./images/fabric-logo-gif.gif" alt="fabriclogo" width="400" height="400"/>
+<img src="./docs/images/fabric-logo-gif.gif" alt="fabriclogo" width="400" height="400"/>
 
 # `fabric`
 
@@ -12,10 +12,11 @@ Fabric is graciously supported by…
 ![GitHub top language](https://img.shields.io/github/languages/top/danielmiessler/fabric)
 ![GitHub last commit](https://img.shields.io/github/last-commit/danielmiessler/fabric)
 [![License: MIT](https://img.shields.io/badge/License-MIT-green.svg)](https://opensource.org/licenses/MIT)
+[![Ask DeepWiki](https://deepwiki.com/badge.svg)](https://deepwiki.com/danielmiessler/fabric)
 
-<p class="align center">
+<div align="center">
 <h4><code>fabric</code> is an open-source framework for augmenting humans using AI.</h4>
-</p>
+</div>
 
 [Updates](#updates) •
 [What and Why](#what-and-why) •
@@ -28,17 +29,40 @@ Fabric is graciously supported by…
 [Helper Apps](#helper-apps) •
 [Meta](#meta)
 
-![Screenshot of fabric](images/fabric-summarize.png)
+![Screenshot of fabric](./docs/images/fabric-summarize.png)
 
 </div>
 
+## What and why
+
+Since the start of modern AI in late 2022 we've seen an **_extraordinary_** number of AI applications for accomplishing tasks. There are thousands of websites, chat-bots, mobile apps, and other interfaces for using all the different AI out there.
+
+It's all really exciting and powerful, but _it's not easy to integrate this functionality into our lives._
+
+<div class="align center">
+<h4>In other words, AI doesn't have a capabilities problem—it has an <em>integration</em> problem.</h4>
+</div>
+
+**Fabric was created to address this by creating and organizing the fundamental units of AI—the prompts themselves!**
+
+Fabric organizes prompts by real-world task, allowing people to create, collect, and organize their most important AI solutions in a single place for use in their favorite tools. And if you're command-line focused, you can use Fabric itself as the interface!
+
+## Intro videos
+
+Keep in mind that many of these were recorded when Fabric was Python-based, so remember to use the current [install instructions](#installation) below.
+
+- [Network Chuck](https://www.youtube.com/watch?v=UbDyjIIGaxQ)
+- [David Bombal](https://www.youtube.com/watch?v=vF-MQmVxnCs)
+- [My Own Intro to the Tool](https://www.youtube.com/watch?v=wPEyyigh10g)
+- [More Fabric YouTube Videos](https://www.youtube.com/results?search_query=fabric+ai)
+
 ## Navigation
 
 - [`fabric`](#fabric)
-  - [Navigation](#navigation)
-  - [Updates](#updates)
   - [What and why](#what-and-why)
   - [Intro videos](#intro-videos)
+  - [Navigation](#navigation)
+  - [Updates](#updates)
   - [Philosophy](#philosophy)
     - [Breaking problems into components](#breaking-problems-into-components)
     - [Too many prompts](#too-many-prompts)
@@ -69,6 +93,9 @@ Fabric is graciously supported by…
   - [Just use the Patterns](#just-use-the-patterns)
     - [Prompt Strategies](#prompt-strategies)
   - [Custom Patterns](#custom-patterns)
+    - [Setting Up Custom Patterns](#setting-up-custom-patterns)
+    - [Using Custom Patterns](#using-custom-patterns)
+    - [How It Works](#how-it-works)
   - [Helper Apps](#helper-apps)
     - [`to_pdf`](#to_pdf)
     - [`to_pdf` Installation](#to_pdf-installation)
@@ -88,9 +115,17 @@ Fabric is graciously supported by…
 
 > [!NOTE]
 >
+> July 4, 2025
+>
+> - **Web Search**: Fabric now supports web search for Anthropic and OpenAI models using the `--search` and `--search-location` flags. This replaces the previous plugin-based search, so you may want to remove the old `ANTHROPIC_WEB_SEARCH_TOOL_*` variables from your `~/.config/fabric/.env` file.
+> - **Image Generation**: Fabric now has powerful image generation capabilities with OpenAI.
+>   - Generate images from text prompts and save them using `--image-file`.
+>   - Edit existing images by providing an input image with `--attachment`.
+>   - Control image `size`, `quality`, `compression`, and `background` with the new `--image-*` flags.
+>
 >June 17, 2025
 >
->- Fabric now supports Perplexity AI. Configure it by using `fabric -S` to add your Perlexity AI API Key,
+>- Fabric now supports Perplexity AI. Configure it by using `fabric -S` to add your Perplexity AI API Key,
 >   and then try:
 >
 >   ```bash
@@ -103,25 +138,6 @@ Fabric is graciously supported by…
 > version (2025.06.09 as of this note). The YouTube API key is only needed for comments (the `--comments` flag)
 > and metadata extraction (the `--metadata` flag).
 
-## What and why
-
-Since the start of 2023 and GenAI we've seen a massive number of AI applications for accomplishing tasks. It's powerful, but _it's not easy to integrate this functionality into our lives._
-
-<div align="center">
-<h4>In other words, AI doesn't have a capabilities problem—it has an <em>integration</em> problem.</h4>
-</div>
-
-Fabric was created to address this by enabling everyone to granularly apply AI to everyday challenges.
-
-## Intro videos
-
-Keep in mind that many of these were recorded when Fabric was Python-based, so remember to use the current [install instructions](#installation) below.
-
-- [Network Chuck](https://www.youtube.com/watch?v=UbDyjIIGaxQ)
-- [David Bombal](https://www.youtube.com/watch?v=vF-MQmVxnCs)
-- [My Own Intro to the Tool](https://www.youtube.com/watch?v=wPEyyigh10g)
-- [More Fabric YouTube Videos](https://www.youtube.com/results?search_query=fabric+ai)
-
 ## Philosophy
 
 > AI isn't a thing; it's a _magnifier_ of a thing. And that thing is **human creativity**.
@@ -202,7 +218,7 @@ To install Fabric, [make sure Go is installed](https://go.dev/doc/install), and
 
 ```bash
 # Install Fabric directly from the repo
-go install github.com/danielmiessler/fabric@latest
+go install github.com/danielmiessler/fabric/cmd/fabric@latest
 ```
 
 ### Environment Variables
@@ -412,7 +428,7 @@ pipx uninstall fabric
 # Clear any old Fabric aliases
 (check your .bashrc, .zshrc, etc.)
 # Install the Go version
-go install github.com/danielmiessler/fabric@latest
+go install github.com/danielmiessler/fabric/cmd/fabric@latest
 # Run setup for the new version. Important because things have changed
 fabric --setup
 ```
@@ -424,7 +440,7 @@ Then [set your environmental variables](#environment-variables) as shown above.
 The great thing about Go is that it's super easy to upgrade. Just run the same command you used to install it in the first place and you'll always get the latest version.
 
 ```bash
-go install github.com/danielmiessler/fabric@latest
+go install github.com/danielmiessler/fabric/cmd/fabric@latest
 ```
 
 ### Shell Completions
@@ -478,7 +494,6 @@ fabric -h
 ```
 
 ```plaintext
-
 Usage:
   fabric [OPTIONS]
 
@@ -493,7 +508,9 @@ Application Options:
   -T, --topp=                       Set top P (default: 0.9)
   -s, --stream                      Stream
   -P, --presencepenalty=            Set presence penalty (default: 0.0)
-  -r, --raw                         Use the defaults of the model without sending chat options (like temperature etc.) and use the user role instead of the system role for patterns.
+  -r, --raw                         Use the defaults of the model without sending chat options (like
+                                    temperature etc.) and use the user role instead of the system role for
+                                    patterns.
   -F, --frequencypenalty=           Set frequency penalty (default: 0.0)
   -l, --listpatterns                List all patterns
   -L, --listmodels                  List all available models
@@ -507,9 +524,12 @@ Application Options:
       --output-session              Output the entire session (also a temporary one) to the output file
   -n, --latest=                     Number of latest patterns to list (default: 0)
   -d, --changeDefaultModel          Change default model
-  -y, --youtube=                    YouTube video or play list "URL" to grab transcript, comments from it and send to chat or print it put to the console and store it in the output file
+  -y, --youtube=                    YouTube video or play list "URL" to grab transcript, comments from it
+                                    and send to chat or print it put to the console and store it in the
+                                    output file
       --playlist                    Prefer playlist over video if both ids are present in the URL
-      --transcript                  Grab transcript from YouTube video and send to chat (it is used per default).
+      --transcript                  Grab transcript from YouTube video and send to chat (it is used per
+                                    default).
       --transcript-with-timestamps  Grab transcript from YouTube video with timestamps and send to chat
       --comments                    Grab comments from YouTube video and send to chat
       --metadata                    Output video metadata
@@ -537,6 +557,14 @@ Application Options:
       --liststrategies              List all strategies
       --listvendors                 List all vendors
       --shell-complete-list         Output raw list without headers/formatting (for shell completion)
+      --search                      Enable web search tool for supported models (Anthropic, OpenAI)
+      --search-location=            Set location for web search results (e.g., 'America/Los_Angeles')
+      --image-file=                 Save generated image to specified file path (e.g., 'output.png')
+      --image-size=                 Image dimensions: 1024x1024, 1536x1024, 1024x1536, auto (default: auto)
+      --image-quality=              Image quality: low, medium, high, auto (default: auto)
+      --image-compression=          Compression level 0-100 for JPEG/WebP formats (default: not set)
+      --image-background=           Background type: opaque, transparent (default: opaque, only for
+                                    PNG/WebP)
 
 Help Options:
   -h, --help                        Show this help message
@@ -600,7 +628,7 @@ Now let's look at some things you can do with Fabric.
 <br />
 <br />
 
-If you're not looking to do anything fancy, and you just want a lot of great prompts, you can navigate to the [`/patterns`](https://github.com/danielmiessler/fabric/tree/main/patterns) directory and start exploring!
+If you're not looking to do anything fancy, and you just want a lot of great prompts, you can navigate to the [`/patterns`](https://github.com/danielmiessler/fabric/tree/main/data/patterns) directory and start exploring!
 
 We hope that if you used nothing else from Fabric, the Patterns by themselves will make the project useful.
 
@@ -616,7 +644,7 @@ be used in addition to the basic patterns.
 See the [Thinking Faster by Writing Less](https://arxiv.org/pdf/2502.18600) paper and
 the [Thought Generation section of Learn Prompting](https://learnprompting.org/docs/advanced/thought_generation/introduction) for examples of prompt strategies.
 
-Each strategy is available as a small `json` file in the [`/strategies`](https://github.com/danielmiessler/fabric/tree/main/strategies) directory.
+Each strategy is available as a small `json` file in the [`/strategies`](https://github.com/danielmiessler/fabric/tree/main/data/strategies) directory.
 
 The prompt modification of the strategy is applied to the system prompt and passed on to the
 LLM in the chat session.
@@ -627,11 +655,48 @@ Use `fabric -S` and select the option to install the strategies in your `~/.conf
 
 You may want to use Fabric to create your own custom Patterns—but not share them with others. No problem!
 
-Just make a directory in `~/.config/custompatterns/` (or wherever) and put your `.md` files in there.
+Fabric now supports a dedicated custom patterns directory that keeps your personal patterns separate from the built-in ones. This means your custom patterns won't be overwritten when you update Fabric's built-in patterns.
 
-When you're ready to use them, copy them into `~/.config/fabric/patterns/`
+### Setting Up Custom Patterns
 
-You can then use them like any other Patterns, but they won't be public unless you explicitly submit them as Pull Requests to the Fabric project. So don't worry—they're private to you.
+1. Run the Fabric setup:
+
+   ```bash
+   fabric --setup
+   ```
+
+2. Select the "Custom Patterns" option from the Tools menu and enter your desired directory path (e.g., `~/my-custom-patterns`)
+
+3. Fabric will automatically create the directory if it does not exist.
+
+### Using Custom Patterns
+
+1. Create your custom pattern directory structure:
+
+   ```bash
+   mkdir -p ~/my-custom-patterns/my-analyzer
+   ```
+
+2. Create your pattern file
+
+   ```bash
+   echo "You are an expert analyzer of ..." > ~/my-custom-patterns/my-analyzer/system.md
+   ```
+
+3. **Use your custom pattern:**
+
+   ```bash
+   fabric --pattern my-analyzer "analyze this text"
+   ```
+
+### How It Works
+
+- **Priority System**: Custom patterns take precedence over built-in patterns with the same name
+- **Seamless Integration**: Custom patterns appear in `fabric --listpatterns` alongside built-in ones
+- **Update Safe**: Your custom patterns are never affected by `fabric --updatepatterns`
+- **Private by Default**: Custom patterns remain private unless you explicitly share them
+
+Your custom patterns are completely private and won't be affected by Fabric updates!
 
 ## Helper Apps
 
@@ -660,7 +725,7 @@ This will create a PDF file named `output.pdf` in the current directory.
 To install `to_pdf`, install it the same way as you install Fabric, just with a different repo name.
 
 ```bash
-go install github.com/danielmiessler/fabric/plugins/tools/to_pdf@latest
+go install github.com/danielmiessler/fabric/cmd/to_pdf@latest
 ```
 
 Make sure you have a LaTeX distribution (like TeX Live or MiKTeX) installed on your system, as `to_pdf` requires `pdflatex` to be available in your system's PATH.
@@ -671,12 +736,12 @@ Make sure you have a LaTeX distribution (like TeX Live or MiKTeX) installed on y
 It generates a `json` representation of a directory of code that can be fed into an AI model
 with instructions to create a new feature or edit the code in a specified way.
 
-See [the Create Coding Feature Pattern README](./patterns/create_coding_feature/README.md) for details.
+See [the Create Coding Feature Pattern README](./data/patterns/create_coding_feature/README.md) for details.
 
 Install it first using:
 
 ```bash
-go install github.com/danielmiessler/fabric/plugins/tools/code_helper@latest
+go install github.com/danielmiessler/fabric/cmd/code_helper@latest
 ```
 
 ## pbpaste
@@ -755,7 +820,7 @@ The Streamlit UI supports clipboard operations across different platforms:
 
 - **macOS**: Uses `pbcopy` and `pbpaste` (built-in)
 - **Windows**: Uses `pyperclip` library (install with `pip install pyperclip`)
-- **Linux**: Uses `xclip` (install with `sudo apt-get install xclip` or equivalent for your distro)
+- **Linux**: Uses `xclip` (install with `sudo apt-get install xclip` or equivalent for your Linux distribution)
 
 ## Meta
 
@@ -773,15 +838,15 @@ The Streamlit UI supports clipboard operations across different platforms:
 
 ### Primary contributors
 
-<a href="https://github.com/danielmiessler"><img src="https://avatars.githubusercontent.com/u/50654?v=4" title="Daniel Miessler" width="50" height="50"></a>
-<a href="https://github.com/xssdoctor"><img src="https://avatars.githubusercontent.com/u/9218431?v=4" title="Jonathan Dunn" width="50" height="50"></a>
-<a href="https://github.com/sbehrens"><img src="https://avatars.githubusercontent.com/u/688589?v=4" title="Scott Behrens" width="50" height="50"></a>
-<a href="https://github.com/agu3rra"><img src="https://avatars.githubusercontent.com/u/10410523?v=4" title="Andre Guerra" width="50" height="50"></a>
+<a href="https://github.com/danielmiessler"><img src="https://avatars.githubusercontent.com/u/50654?v=4" title="Daniel Miessler" width="50" height="50" alt="Daniel Miessler"></a>
+<a href="https://github.com/xssdoctor"><img src="https://avatars.githubusercontent.com/u/9218431?v=4" title="Jonathan Dunn" width="50" height="50" alt="Jonathan Dunn"></a>
+<a href="https://github.com/sbehrens"><img src="https://avatars.githubusercontent.com/u/688589?v=4" title="Scott Behrens" width="50" height="50" alt="Scott Behrens"></a>
+<a href="https://github.com/agu3rra"><img src="https://avatars.githubusercontent.com/u/10410523?v=4" title="Andre Guerra" width="50" height="50" alt="Andre Guerra"></a>
 
 ### Contributors
 
 <a href="https://github.com/danielmiessler/fabric/graphs/contributors">
-  <img src="https://contrib.rocks/image?repo=danielmiessler/fabric" />
+  <img src="https://contrib.rocks/image?repo=danielmiessler/fabric" alt="contrib.rocks" />
 </a>
 
 Made with [contrib.rocks](https://contrib.rocks).

cli/cli.go

@@ -1,357 +0,0 @@
-package cli
-
-import (
-	"encoding/json"
-	"fmt"
-	"os"
-	"path/filepath"
-	"strconv"
-	"strings"
-
-	"github.com/danielmiessler/fabric/plugins/tools/youtube"
-
-	"github.com/danielmiessler/fabric/common"
-	"github.com/danielmiessler/fabric/core"
-	"github.com/danielmiessler/fabric/plugins/ai"
-	"github.com/danielmiessler/fabric/plugins/db/fsdb"
-	"github.com/danielmiessler/fabric/plugins/tools/converter"
-	"github.com/danielmiessler/fabric/restapi"
-)
-
-// Cli Controls the cli. It takes in the flags and runs the appropriate functions
-func Cli(version string) (err error) {
-	var currentFlags *Flags
-	if currentFlags, err = Init(); err != nil {
-		return
-	}
-
-	if currentFlags.Version {
-		fmt.Println(version)
-		return
-	}
-
-	var homedir string
-	if homedir, err = os.UserHomeDir(); err != nil {
-		return
-	}
-
-	fabricDb := fsdb.NewDb(filepath.Join(homedir, ".config/fabric"))
-
-	if err = fabricDb.Configure(); err != nil {
-		if !currentFlags.Setup {
-			println(err.Error())
-			currentFlags.Setup = true
-		}
-	}
-
-	var registry *core.PluginRegistry
-	if registry, err = core.NewPluginRegistry(fabricDb); err != nil {
-		return
-	}
-
-	// if the setup flag is set, run the setup function
-	if currentFlags.Setup {
-		err = registry.Setup()
-		return
-	}
-
-	if currentFlags.Serve {
-		registry.ConfigureVendors()
-		err = restapi.Serve(registry, currentFlags.ServeAddress, currentFlags.ServeAPIKey)
-		return
-	}
-
-	if currentFlags.ServeOllama {
-		registry.ConfigureVendors()
-		err = restapi.ServeOllama(registry, currentFlags.ServeAddress, version)
-		return
-	}
-
-	if currentFlags.UpdatePatterns {
-		err = registry.PatternsLoader.PopulateDB()
-		return
-	}
-
-	if currentFlags.ChangeDefaultModel {
-		if err = registry.Defaults.Setup(); err != nil {
-			return
-		}
-		err = registry.SaveEnvFile()
-		return
-	}
-
-	if currentFlags.LatestPatterns != "0" {
-		var parsedToInt int
-		if parsedToInt, err = strconv.Atoi(currentFlags.LatestPatterns); err != nil {
-			return
-		}
-
-		if err = fabricDb.Patterns.PrintLatestPatterns(parsedToInt); err != nil {
-			return
-		}
-		return
-	}
-
-	if currentFlags.ListPatterns {
-		err = fabricDb.Patterns.ListNames(currentFlags.ShellCompleteOutput)
-		return
-	}
-
-	if currentFlags.ListAllModels {
-		var models *ai.VendorsModels
-		if models, err = registry.VendorManager.GetModels(); err != nil {
-			return
-		}
-		models.Print(currentFlags.ShellCompleteOutput)
-		return
-	}
-
-	if currentFlags.ListAllContexts {
-		err = fabricDb.Contexts.ListNames(currentFlags.ShellCompleteOutput)
-		return
-	}
-
-	if currentFlags.ListAllSessions {
-		err = fabricDb.Sessions.ListNames(currentFlags.ShellCompleteOutput)
-		return
-	}
-
-	if currentFlags.WipeContext != "" {
-		err = fabricDb.Contexts.Delete(currentFlags.WipeContext)
-		return
-	}
-
-	if currentFlags.WipeSession != "" {
-		err = fabricDb.Sessions.Delete(currentFlags.WipeSession)
-		return
-	}
-
-	if currentFlags.PrintSession != "" {
-		err = fabricDb.Sessions.PrintSession(currentFlags.PrintSession)
-		return
-	}
-
-	if currentFlags.PrintContext != "" {
-		err = fabricDb.Contexts.PrintContext(currentFlags.PrintContext)
-		return
-	}
-
-	if currentFlags.HtmlReadability {
-		if msg, cleanErr := converter.HtmlReadability(currentFlags.Message); cleanErr != nil {
-			fmt.Println("use original input, because can't apply html readability", err)
-		} else {
-			currentFlags.Message = msg
-		}
-	}
-
-	if currentFlags.ListExtensions {
-		err = registry.TemplateExtensions.ListExtensions()
-		return
-	}
-
-	if currentFlags.AddExtension != "" {
-		err = registry.TemplateExtensions.RegisterExtension(currentFlags.AddExtension)
-		return
-	}
-
-	if currentFlags.RemoveExtension != "" {
-		err = registry.TemplateExtensions.RemoveExtension(currentFlags.RemoveExtension)
-		return
-	}
-
-	if currentFlags.ListStrategies {
-		err = registry.Strategies.ListStrategies(currentFlags.ShellCompleteOutput)
-		return
-	}
-
-	if currentFlags.ListVendors {
-		err = registry.ListVendors(os.Stdout)
-		return
-	}
-
-	// if the interactive flag is set, run the interactive function
-	// if currentFlags.Interactive {
-	// 	interactive.Interactive()
-	// }
-
-	// if none of the above currentFlags are set, run the initiate chat function
-
-	var messageTools string
-
-	if currentFlags.YouTube != "" {
-		if !registry.YouTube.IsConfigured() {
-			err = fmt.Errorf("YouTube is not configured, please run the setup procedure")
-			return
-		}
-
-		var videoId string
-		var playlistId string
-		if videoId, playlistId, err = registry.YouTube.GetVideoOrPlaylistId(currentFlags.YouTube); err != nil {
-			return
-		} else if (videoId == "" || currentFlags.YouTubePlaylist) && playlistId != "" {
-			if currentFlags.Output != "" {
-				err = registry.YouTube.FetchAndSavePlaylist(playlistId, currentFlags.Output)
-			} else {
-				var videos []*youtube.VideoMeta
-				if videos, err = registry.YouTube.FetchPlaylistVideos(playlistId); err != nil {
-					err = fmt.Errorf("error fetching playlist videos: %v", err)
-					return
-				}
-
-				for _, video := range videos {
-					var message string
-					if message, err = processYoutubeVideo(currentFlags, registry, video.Id); err != nil {
-						return
-					}
-
-					if !currentFlags.IsChatRequest() {
-						if err = WriteOutput(message, fmt.Sprintf("%v.md", video.TitleNormalized)); err != nil {
-							return
-						}
-					} else {
-						messageTools = AppendMessage(messageTools, message)
-					}
-				}
-			}
-			return
-		}
-
-		if messageTools, err = processYoutubeVideo(currentFlags, registry, videoId); err != nil {
-			return
-		}
-		if !currentFlags.IsChatRequest() {
-			err = currentFlags.WriteOutput(messageTools)
-			return
-		}
-	}
-
-	if (currentFlags.ScrapeURL != "" || currentFlags.ScrapeQuestion != "") && registry.Jina.IsConfigured() {
-		// Check if the scrape_url flag is set and call ScrapeURL
-		if currentFlags.ScrapeURL != "" {
-			var website string
-			if website, err = registry.Jina.ScrapeURL(currentFlags.ScrapeURL); err != nil {
-				return
-			}
-			messageTools = AppendMessage(messageTools, website)
-		}
-
-		// Check if the scrape_question flag is set and call ScrapeQuestion
-		if currentFlags.ScrapeQuestion != "" {
-			var website string
-			if website, err = registry.Jina.ScrapeQuestion(currentFlags.ScrapeQuestion); err != nil {
-				return
-			}
-
-			messageTools = AppendMessage(messageTools, website)
-		}
-
-		if !currentFlags.IsChatRequest() {
-			err = currentFlags.WriteOutput(messageTools)
-			return
-		}
-	}
-
-	if messageTools != "" {
-		currentFlags.AppendMessage(messageTools)
-	}
-
-	var chatter *core.Chatter
-	if chatter, err = registry.GetChatter(currentFlags.Model, currentFlags.ModelContextLength,
-		currentFlags.Strategy, currentFlags.Stream, currentFlags.DryRun); err != nil {
-		return
-	}
-
-	var session *fsdb.Session
-	var chatReq *common.ChatRequest
-	if chatReq, err = currentFlags.BuildChatRequest(strings.Join(os.Args[1:], " ")); err != nil {
-		return
-	}
-
-	if chatReq.Language == "" {
-		chatReq.Language = registry.Language.DefaultLanguage.Value
-	}
-	if session, err = chatter.Send(chatReq, currentFlags.BuildChatOptions()); err != nil {
-		return
-	}
-
-	result := session.GetLastMessage().Content
-
-	if !currentFlags.Stream {
-		// print the result if it was not streamed already
-		fmt.Println(result)
-	}
-
-	// if the copy flag is set, copy the message to the clipboard
-	if currentFlags.Copy {
-		if err = CopyToClipboard(result); err != nil {
-			return
-		}
-	}
-
-	// if the output flag is set, create an output file
-	if currentFlags.Output != "" {
-		if currentFlags.OutputSession {
-			sessionAsString := session.String()
-			err = CreateOutputFile(sessionAsString, currentFlags.Output)
-		} else {
-			err = CreateOutputFile(result, currentFlags.Output)
-		}
-	}
-	return
-}
-
-func processYoutubeVideo(
-	flags *Flags, registry *core.PluginRegistry, videoId string) (message string, err error) {
-
-	if (!flags.YouTubeComments && !flags.YouTubeMetadata) || flags.YouTubeTranscript || flags.YouTubeTranscriptWithTimestamps {
-		var transcript string
-		var language = "en"
-		if flags.Language != "" || registry.Language.DefaultLanguage.Value != "" {
-			if flags.Language != "" {
-				language = flags.Language
-			} else {
-				language = registry.Language.DefaultLanguage.Value
-			}
-		}
-		if flags.YouTubeTranscriptWithTimestamps {
-			if transcript, err = registry.YouTube.GrabTranscriptWithTimestamps(videoId, language); err != nil {
-				return
-			}
-		} else {
-			if transcript, err = registry.YouTube.GrabTranscript(videoId, language); err != nil {
-				return
-			}
-		}
-		message = AppendMessage(message, transcript)
-	}
-
-	if flags.YouTubeComments {
-		var comments []string
-		if comments, err = registry.YouTube.GrabComments(videoId); err != nil {
-			return
-		}
-
-		commentsString := strings.Join(comments, "\n")
-
-		message = AppendMessage(message, commentsString)
-	}
-
-	if flags.YouTubeMetadata {
-		var metadata *youtube.VideoMetadata
-		if metadata, err = registry.YouTube.GrabMetadata(videoId); err != nil {
-			return
-		}
-		metadataJson, _ := json.MarshalIndent(metadata, "", "  ")
-		message = AppendMessage(message, string(metadataJson))
-	}
-
-	return
-}
-
-func WriteOutput(message string, outputFile string) (err error) {
-	fmt.Println(message)
-	if outputFile != "" {
-		err = CreateOutputFile(message, outputFile)
-	}
-	return
-}

cli/flags_test.go

@@ -1,166 +0,0 @@
-package cli
-
-import (
-	"bytes"
-	"io"
-	"os"
-	"strings"
-	"testing"
-
-	"github.com/danielmiessler/fabric/common"
-	"github.com/stretchr/testify/assert"
-)
-
-func TestInit(t *testing.T) {
-	args := []string{"--copy"}
-	expectedFlags := &Flags{Copy: true}
-	oldArgs := os.Args
-	defer func() { os.Args = oldArgs }()
-	os.Args = append([]string{"cmd"}, args...)
-
-	flags, err := Init()
-	assert.NoError(t, err)
-	assert.Equal(t, expectedFlags.Copy, flags.Copy)
-}
-
-func TestReadStdin(t *testing.T) {
-	input := "test input"
-	stdin := io.NopCloser(strings.NewReader(input))
-	// No need to cast stdin to *os.File, pass it as io.ReadCloser directly
-	content, err := ReadStdin(stdin)
-	if err != nil {
-		t.Fatalf("unexpected error: %v", err)
-	}
-	if content != input {
-		t.Fatalf("expected %q, got %q", input, content)
-	}
-}
-
-// ReadStdin function assuming it's part of `cli` package
-func ReadStdin(reader io.ReadCloser) (string, error) {
-	defer reader.Close()
-	buf := new(bytes.Buffer)
-	_, err := buf.ReadFrom(reader)
-	if err != nil {
-		return "", err
-	}
-	return buf.String(), nil
-}
-
-func TestBuildChatOptions(t *testing.T) {
-	flags := &Flags{
-		Temperature:      0.8,
-		TopP:             0.9,
-		PresencePenalty:  0.1,
-		FrequencyPenalty: 0.2,
-		Seed:             1,
-	}
-
-	expectedOptions := &common.ChatOptions{
-		Temperature:      0.8,
-		TopP:             0.9,
-		PresencePenalty:  0.1,
-		FrequencyPenalty: 0.2,
-		Raw:              false,
-		Seed:             1,
-	}
-	options := flags.BuildChatOptions()
-	assert.Equal(t, expectedOptions, options)
-}
-
-func TestBuildChatOptionsDefaultSeed(t *testing.T) {
-	flags := &Flags{
-		Temperature:      0.8,
-		TopP:             0.9,
-		PresencePenalty:  0.1,
-		FrequencyPenalty: 0.2,
-	}
-
-	expectedOptions := &common.ChatOptions{
-		Temperature:      0.8,
-		TopP:             0.9,
-		PresencePenalty:  0.1,
-		FrequencyPenalty: 0.2,
-		Raw:              false,
-		Seed:             0,
-	}
-	options := flags.BuildChatOptions()
-	assert.Equal(t, expectedOptions, options)
-}
-
-func TestInitWithYAMLConfig(t *testing.T) {
-	// Create a temporary YAML config file
-	configContent := `
-temperature: 0.9
-model: gpt-4
-pattern: analyze
-stream: true
-`
-	tmpfile, err := os.CreateTemp("", "config.*.yaml")
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer os.Remove(tmpfile.Name())
-
-	if _, err := tmpfile.Write([]byte(configContent)); err != nil {
-		t.Fatal(err)
-	}
-	if err := tmpfile.Close(); err != nil {
-		t.Fatal(err)
-	}
-
-	// Test 1: Basic YAML loading
-	t.Run("Load YAML config", func(t *testing.T) {
-		oldArgs := os.Args
-		defer func() { os.Args = oldArgs }()
-		os.Args = []string{"cmd", "--config", tmpfile.Name()}
-
-		flags, err := Init()
-		assert.NoError(t, err)
-		assert.Equal(t, 0.9, flags.Temperature)
-		assert.Equal(t, "gpt-4", flags.Model)
-		assert.Equal(t, "analyze", flags.Pattern)
-		assert.True(t, flags.Stream)
-	})
-
-	// Test 2: CLI overrides YAML
-	t.Run("CLI overrides YAML", func(t *testing.T) {
-		oldArgs := os.Args
-		defer func() { os.Args = oldArgs }()
-		os.Args = []string{"cmd", "--config", tmpfile.Name(), "--temperature", "0.7", "--model", "gpt-3.5-turbo"}
-
-		flags, err := Init()
-		assert.NoError(t, err)
-		assert.Equal(t, 0.7, flags.Temperature)
-		assert.Equal(t, "gpt-3.5-turbo", flags.Model)
-		assert.Equal(t, "analyze", flags.Pattern) // unchanged from YAML
-		assert.True(t, flags.Stream)              // unchanged from YAML
-	})
-
-	// Test 3: Invalid YAML config
-	t.Run("Invalid YAML config", func(t *testing.T) {
-		badConfig := `
-temperature: "not a float"
-model: 123  # should be string
-`
-		badfile, err := os.CreateTemp("", "bad-config.*.yaml")
-		if err != nil {
-			t.Fatal(err)
-		}
-		defer os.Remove(badfile.Name())
-
-		if _, err := badfile.Write([]byte(badConfig)); err != nil {
-			t.Fatal(err)
-		}
-		if err := badfile.Close(); err != nil {
-			t.Fatal(err)
-		}
-
-		oldArgs := os.Args
-		defer func() { os.Args = oldArgs }()
-		os.Args = []string{"cmd", "--config", badfile.Name()}
-
-		_, err = Init()
-		assert.Error(t, err)
-	})
-}

cmd/fabric/main.go

@@ -6,7 +6,7 @@ import (
 
 	"github.com/jessevdk/go-flags"
 
-	"github.com/danielmiessler/fabric/cli"
+	"github.com/danielmiessler/fabric/internal/cli"
 )
 
 func main() {

cmd/fabric/version.go

@@ -0,0 +1,3 @@
+package main
+
+var version = "v1.4.248"

cmd/generate_changelog/PRD.md

@@ -0,0 +1,151 @@
+# Product Requirements Document: Changelog Generator
+
+## Overview
+
+The Changelog Generator is a high-performance Go tool that automatically generates comprehensive changelogs from git history and GitHub pull requests.
+
+## Goals
+
+1. **Performance**: Very fast. Efficient enough to be used in CI/CD as part of release process.
+2. **Completeness**: Capture ALL commits including unreleased changes
+3. **Efficiency**: Minimize API calls through caching and batch operations
+4. **Reliability**: Handle errors gracefully with proper Go error handling
+5. **Simplicity**: Single binary with no runtime dependencies
+
+## Key Features
+
+### 1. One-Pass Git History Algorithm
+
+- Walk git history once from newest to oldest
+- Start with "Unreleased" bucket for all new commits
+- Switch buckets when encountering version commits
+- No need to calculate ranges between versions
+
+### 2. Native Library Integration
+
+- **go-git**: Pure Go git implementation (no git binary required)
+- **go-github**: Official GitHub Go client library
+- Benefits: Type safety, better error handling, no subprocess overhead
+
+### 3. Smart Caching System
+
+- SQLite-based persistent cache
+- Stores: versions, commits, PR details, last processed commit
+- Enables incremental updates on subsequent runs
+- Instant changelog regeneration from cache
+
+### 4. Concurrent Processing
+
+- Parallel GitHub API calls (up to 10 concurrent)
+- Batch PR fetching with deduplication
+- Rate limiting awareness
+
+### 5. Enhanced Output
+
+- "Unreleased" section for commits since last version
+- Clean markdown formatting
+- Configurable version limiting
+- Direct commit tracking (non-PR commits)
+
+## Technical Architecture
+
+### Module Structure
+
+```text
+cmd/generate_changelog/
+├── main.go              # CLI entry point with cobra
+├── internal/
+│   ├── git/            # Git operations (go-git)
+│   ├── github/         # GitHub API client (go-github)
+│   ├── cache/          # SQLite caching layer
+│   ├── changelog/      # Core generation logic
+│   └── config/         # Configuration management
+└── changelog.db        # SQLite cache (generated)
+```
+
+### Data Flow
+
+1. Git walker collects all commits in one pass
+2. Commits bucketed by version (starting with "Unreleased")
+3. PR numbers extracted from merge commits
+4. GitHub API batch-fetches PR details
+5. Cache stores everything for future runs
+6. Formatter generates markdown output
+
+### Cache Schema
+
+- **metadata**: Last processed commit SHA
+- **versions**: Version names, dates, commit SHAs
+- **commits**: Full commit details with version associations
+- **pull_requests**: PR details including commits
+- Indexes on version and PR number for fast lookups
+
+### Features
+
+- **Unreleased section**: Shows all new commits
+- **Better caching**: SQLite vs JSON, incremental updates
+- **Smarter deduplication**: Removes consecutive duplicate commits
+- **Direct commit tracking**: Shows non-PR commits
+
+### Reliability
+
+- **No subprocess errors**: Direct library usage
+- **Type safety**: Compile-time checking
+- **Better error handling**: Go's explicit error returns
+
+### Deployment
+
+- **Single binary**: No Python/pip/dependencies
+- **Cross-platform**: Compile for any OS/architecture
+- **No git CLI required**: Uses go-git library
+
+## Configuration
+
+### Environment Variables
+
+- `GITHUB_TOKEN`: GitHub API authentication token
+
+### Command Line Flags
+
+- `--repo, -r`: Repository path (default: current directory)
+- `--output, -o`: Output file (default: stdout)
+- `--limit, -l`: Version limit (default: all)
+- `--version, -v`: Target specific version
+- `--save-data`: Export debug JSON
+- `--cache`: Cache file location
+- `--no-cache`: Disable caching
+- `--rebuild-cache`: Force cache rebuild
+- `--token`: GitHub token override
+
+## Success Metrics
+
+1. **Performance**: Generate full changelog in <5 seconds for fabric repo
+2. **Completeness**: 100% commit coverage including unreleased
+3. **Accuracy**: Correct PR associations and change extraction
+4. **Reliability**: Handle network failures gracefully
+5. **Usability**: Simple CLI with sensible defaults
+
+## Future Enhancements
+
+1. **Multiple output formats**: JSON, HTML, etc.
+2. **Custom version patterns**: Configurable regex
+3. **Change categorization**: feat/fix/docs auto-grouping
+4. **Conventional commits**: Full support for semantic versioning
+5. **GitLab/Bitbucket**: Support other platforms
+6. **Web UI**: Interactive changelog browser
+7. **Incremental updates**: Update existing CHANGELOG.md file
+8. **Breaking change detection**: Highlight breaking changes
+
+## Implementation Status
+
+- ✅ Core architecture and modules
+- ✅ One-pass git walking algorithm
+- ✅ GitHub API integration with concurrency
+- ✅ SQLite caching system
+- ✅ Changelog formatting and generation
+- ✅ CLI with all planned flags
+- ✅ Documentation (README and PRD)
+
+## Conclusion
+
+This Go implementation provides a modern, efficient, and feature-rich changelog generator.

cmd/generate_changelog/README.md

@@ -0,0 +1,263 @@
+# Changelog Generator
+
+A high-performance changelog generator for Git repositories that automatically creates comprehensive, well-formatted changelogs from your git history and GitHub pull requests.
+
+## Features
+
+- **One-pass git history walking**: Efficiently processes entire repository history in a single pass
+- **Automatic PR detection**: Extracts pull request information from merge commits
+- **GitHub API integration**: Fetches detailed PR information including commits, authors, and descriptions
+- **Smart caching**: SQLite-based caching for instant incremental updates
+- **Unreleased changes**: Tracks all commits since the last release
+- **Concurrent processing**: Parallel GitHub API calls for improved performance
+- **Flexible output**: Generate complete changelogs or target specific versions
+- **GraphQL optimization**: Ultra-fast PR fetching using GitHub GraphQL API (~5-10 calls vs 1000s)
+- **Intelligent sync**: Automatically syncs new PRs every 24 hours or when missing PRs are detected
+- **AI-powered summaries**: Optional Fabric integration for enhanced changelog summaries
+- **Advanced caching**: Content-based change detection for AI summaries with hash comparison
+- **Author type detection**: Distinguishes between users, bots, and organizations
+- **Lightning-fast incremental updates**: SHA→PR mapping for instant git operations
+
+## Installation
+
+```bash
+go install github.com/danielmiessler/fabric/cmd/generate_changelog@latest
+```
+
+## Usage
+
+### Basic usage (generate complete changelog)
+
+```bash
+generate_changelog
+```
+
+### Save to file
+
+```bash
+generate_changelog -o CHANGELOG.md
+```
+
+### Generate for specific version
+
+```bash
+generate_changelog -v v1.4.244
+```
+
+### Limit to recent versions
+
+```bash
+generate_changelog -l 10
+```
+
+### Using GitHub token for private repos or higher rate limits
+
+```bash
+export GITHUB_TOKEN=your_token_here
+generate_changelog
+
+# Or pass directly
+generate_changelog --token your_token_here
+```
+
+### AI-enhanced summaries
+
+```bash
+# Enable AI summaries using Fabric
+generate_changelog --ai-summarize
+
+# Use custom model for AI summaries
+FABRIC_CHANGELOG_SUMMARIZE_MODEL=claude-opus-4 generate_changelog --ai-summarize
+```
+
+### Cache management
+
+```bash
+# Rebuild cache from scratch
+generate_changelog --rebuild-cache
+
+# Force a full PR sync from GitHub
+generate_changelog --force-pr-sync
+
+# Disable cache usage
+generate_changelog --no-cache
+
+# Use custom cache location
+generate_changelog --cache /path/to/cache.db
+```
+
+## Command Line Options
+
+| Flag | Short | Description | Default |
+|------|-------|-------------|---------|
+| `--repo` | `-r` | Repository path | `.` (current directory) |
+| `--output` | `-o` | Output file | stdout |
+| `--limit` | `-l` | Limit number of versions | 0 (all) |
+| `--version` | `-v` | Generate for specific version | |
+| `--save-data` | | Save version data to JSON | false |
+| `--cache` | | Cache database file | `./cmd/generate_changelog/changelog.db` |
+| `--no-cache` | | Disable cache usage | false |
+| `--rebuild-cache` | | Rebuild cache from scratch | false |
+| `--force-pr-sync` | | Force a full PR sync from GitHub | false |
+| `--token` | | GitHub API token | `$GITHUB_TOKEN` |
+| `--ai-summarize` | | Generate AI-enhanced summaries using Fabric | false |
+
+## Output Format
+
+The generated changelog follows this structure:
+
+```markdown
+# Changelog
+
+## Unreleased
+
+### PR [#1601](url) by [author](profile): PR Title
+- Change description 1
+- Change description 2
+
+### Direct commits
+- Direct commit message 1
+- Direct commit message 2
+
+## v1.4.244 (2025-07-09)
+
+### PR [#1598](url) by [author](profile): PR Title
+- Change description
+...
+```
+
+## How It Works
+
+1. **Git History Walking**: The tool walks through your git history from newest to oldest commits
+2. **Version Detection**: Identifies version bump commits (pattern: "Update version to vX.Y.Z")
+3. **PR Extraction**: Detects merge commits and extracts PR numbers
+4. **GitHub API Calls**: Fetches detailed PR information in parallel batches
+5. **Change Extraction**: Extracts changes from PR commit messages or PR body
+6. **Formatting**: Generates clean, organized markdown output
+
+## Performance
+
+- **Native Go libraries**: Uses go-git and go-github for maximum performance
+- **Concurrent API calls**: Processes up to 10 GitHub API requests in parallel
+- **Smart caching**: SQLite cache eliminates redundant API calls
+- **Incremental updates**: Only processes new commits on subsequent runs
+- **GraphQL optimization**: Uses GitHub GraphQL API to fetch all PR data in ~5-10 calls
+- **AI-powered summaries**: Optional Fabric integration with intelligent caching
+- **Content-based change detection**: AI summaries only regenerated when content changes
+- **Lightning-fast git operations**: SHA→PR mapping stored in database for instant lookups
+
+### Major Optimization: GraphQL + Advanced Caching
+
+The tool has been optimized to drastically reduce GitHub API calls and improve performance:
+
+**Previous approach**: Individual API calls for each PR (2 API calls per PR)
+
+- For a repo with 500 PRs: 1,000 API calls
+
+**Current approach**: GraphQL batch fetching with intelligent caching
+
+- For a repo with 500 PRs: ~5-10 GraphQL calls (initial fetch) + 0 calls (subsequent runs with cache)
+- **99%+ reduction in API calls after initial run!**
+
+The optimization includes:
+
+1. **GraphQL Batch Fetch**: Uses GitHub's GraphQL API to fetch all merged PRs with commits in minimal calls
+2. **Smart Caching**: Stores complete PR data, commits, and SHA mappings in SQLite
+3. **Incremental Sync**: Only fetches PRs merged after the last sync timestamp
+4. **Automatic Refresh**: PRs are synced every 24 hours or when missing PRs are detected
+5. **AI Summary Caching**: Content-based change detection prevents unnecessary AI regeneration
+6. **Fallback Support**: If GraphQL fails, falls back to REST API batch fetching
+7. **Lightning Git Operations**: Pre-computed SHA→PR mappings for instant commit association
+
+## Requirements
+
+- Go 1.24+ (for installation from source)
+- Git repository
+- GitHub token (optional, for private repos or higher rate limits)
+- Fabric CLI (optional, for AI-enhanced summaries)
+
+## Authentication
+
+The tool supports GitHub authentication via:
+
+1. Environment variable: `export GITHUB_TOKEN=your_token`
+2. Command line flag: `--token your_token`
+3. `.env` file in the same directory as the binary
+
+### Environment File Support
+
+Create a `.env` file next to the `generate_changelog` binary:
+
+```bash
+GITHUB_TOKEN=your_github_token_here
+FABRIC_CHANGELOG_SUMMARIZE_MODEL=claude-sonnet-4-20250514
+```
+
+The tool automatically loads `.env` files for convenient configuration management.
+
+Without authentication, the tool is limited to 60 GitHub API requests per hour.
+
+## Caching
+
+The SQLite cache stores:
+
+- Version information and commit associations
+- Pull request details (title, body, commits, authors)
+- Last processed commit SHA for incremental updates
+- Last PR sync timestamp for intelligent refresh
+- AI summaries with content-based change detection
+- SHA→PR mappings for lightning-fast git operations
+
+Cache benefits:
+
+- Instant changelog regeneration
+- Drastically reduced GitHub API usage (99%+ reduction after initial run)
+- Offline changelog generation (after initial cache build)
+- Automatic PR data refresh every 24 hours
+- Batch database transactions for better performance
+- Content-aware AI summary regeneration
+
+## AI-Enhanced Summaries
+
+The tool can generate AI-powered summaries using Fabric for more polished, professional changelogs:
+
+```bash
+# Enable AI summarization
+generate_changelog --ai-summarize
+
+# Custom model (default: claude-sonnet-4-20250514)
+FABRIC_CHANGELOG_SUMMARIZE_MODEL=claude-opus-4 generate_changelog --ai-summarize
+```
+
+### AI Summary Features
+
+- **Content-based change detection**: AI summaries are only regenerated when version content changes
+- **Intelligent caching**: Preserves existing summaries and only processes changed versions
+- **Content hash comparison**: Uses SHA256 hashing to detect when "Unreleased" content changes
+- **Automatic fallback**: Falls back to raw content if AI processing fails
+- **Error detection**: Identifies and handles AI processing errors gracefully
+- **Minimum content filtering**: Skips AI processing for very brief content (< 256 characters)
+
+### AI Model Configuration
+
+Set the model via environment variable:
+
+```bash
+export FABRIC_CHANGELOG_SUMMARIZE_MODEL=claude-opus-4
+# or
+export FABRIC_CHANGELOG_SUMMARIZE_MODEL=gpt-4
+```
+
+AI summaries are cached and only regenerated when:
+
+- Version content changes (detected via hash comparison)
+- No existing AI summary exists for the version
+- Force rebuild is requested
+
+## Contributing
+
+This tool is part of the Fabric project. Contributions are welcome!
+
+## License
+
+The MIT License. Same as the Fabric project.

cmd/generate_changelog/internal/cache/cache.go

@@ -0,0 +1,448 @@
+package cache
+
+import (
+	"database/sql"
+	"encoding/json"
+	"fmt"
+	"time"
+
+	"github.com/danielmiessler/fabric/cmd/generate_changelog/internal/git"
+	"github.com/danielmiessler/fabric/cmd/generate_changelog/internal/github"
+	_ "github.com/mattn/go-sqlite3"
+)
+
+type Cache struct {
+	db *sql.DB
+}
+
+func New(dbPath string) (*Cache, error) {
+	db, err := sql.Open("sqlite3", dbPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open database: %w", err)
+	}
+
+	cache := &Cache{db: db}
+	if err := cache.createTables(); err != nil {
+		return nil, fmt.Errorf("failed to create tables: %w", err)
+	}
+
+	return cache, nil
+}
+
+func (c *Cache) Close() error {
+	return c.db.Close()
+}
+
+func (c *Cache) createTables() error {
+	queries := []string{
+		`CREATE TABLE IF NOT EXISTS metadata (
+			key TEXT PRIMARY KEY,
+			value TEXT NOT NULL,
+			updated_at DATETIME DEFAULT CURRENT_TIMESTAMP
+		)`,
+		`CREATE TABLE IF NOT EXISTS versions (
+			name TEXT PRIMARY KEY,
+			date DATETIME,
+			commit_sha TEXT,
+			pr_numbers TEXT,
+			ai_summary TEXT,
+			created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+		)`,
+		`CREATE TABLE IF NOT EXISTS commits (
+			sha TEXT PRIMARY KEY,
+			version TEXT NOT NULL,
+			message TEXT,
+			author TEXT,
+			email TEXT,
+			date DATETIME,
+			is_merge BOOLEAN,
+			pr_number INTEGER,
+			created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+			FOREIGN KEY (version) REFERENCES versions(name)
+		)`,
+		`CREATE TABLE IF NOT EXISTS pull_requests (
+			number INTEGER PRIMARY KEY,
+			title TEXT,
+			body TEXT,
+			author TEXT,
+			author_url TEXT,
+			author_type TEXT DEFAULT 'user',
+			url TEXT,
+			merged_at DATETIME,
+			merge_commit TEXT,
+			commits TEXT,
+			created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+		)`,
+		`CREATE INDEX IF NOT EXISTS idx_commits_version ON commits(version)`,
+		`CREATE INDEX IF NOT EXISTS idx_commits_pr_number ON commits(pr_number)`,
+		`CREATE TABLE IF NOT EXISTS commit_pr_mapping (
+			commit_sha TEXT PRIMARY KEY,
+			pr_number INTEGER NOT NULL,
+			created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+			FOREIGN KEY (pr_number) REFERENCES pull_requests(number)
+		)`,
+		`CREATE INDEX IF NOT EXISTS idx_commit_pr_mapping_sha ON commit_pr_mapping(commit_sha)`,
+	}
+
+	for _, query := range queries {
+		if _, err := c.db.Exec(query); err != nil {
+			return fmt.Errorf("failed to execute query: %w", err)
+		}
+	}
+
+	return nil
+}
+
+func (c *Cache) GetLastProcessedTag() (string, error) {
+	var tag string
+	err := c.db.QueryRow("SELECT value FROM metadata WHERE key = 'last_processed_tag'").Scan(&tag)
+	if err == sql.ErrNoRows {
+		return "", nil
+	}
+	return tag, err
+}
+
+func (c *Cache) SetLastProcessedTag(tag string) error {
+	_, err := c.db.Exec(`
+		INSERT OR REPLACE INTO metadata (key, value, updated_at)
+		VALUES ('last_processed_tag', ?, CURRENT_TIMESTAMP)
+	`, tag)
+	return err
+}
+
+func (c *Cache) SaveVersion(v *git.Version) error {
+	prNumbers, _ := json.Marshal(v.PRNumbers)
+
+	_, err := c.db.Exec(`
+		INSERT OR REPLACE INTO versions (name, date, commit_sha, pr_numbers, ai_summary)
+		VALUES (?, ?, ?, ?, ?)
+	`, v.Name, v.Date, v.CommitSHA, string(prNumbers), v.AISummary)
+
+	return err
+}
+
+// UpdateVersionAISummary updates only the AI summary for a specific version
+func (c *Cache) UpdateVersionAISummary(versionName, aiSummary string) error {
+	_, err := c.db.Exec(`
+		UPDATE versions SET ai_summary = ? WHERE name = ?
+	`, aiSummary, versionName)
+	return err
+}
+
+func (c *Cache) SaveCommit(commit *git.Commit, version string) error {
+	_, err := c.db.Exec(`
+		INSERT OR REPLACE INTO commits
+		(sha, version, message, author, email, date, is_merge, pr_number)
+		VALUES (?, ?, ?, ?, ?, ?, ?, ?)
+	`, commit.SHA, version, commit.Message, commit.Author, commit.Email,
+		commit.Date, commit.IsMerge, commit.PRNumber)
+
+	return err
+}
+
+func (c *Cache) SavePR(pr *github.PR) error {
+	commits, _ := json.Marshal(pr.Commits)
+
+	_, err := c.db.Exec(`
+		INSERT OR REPLACE INTO pull_requests
+		(number, title, body, author, author_url, author_type, url, merged_at, merge_commit, commits)
+		VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+	`, pr.Number, pr.Title, pr.Body, pr.Author, pr.AuthorURL, pr.AuthorType,
+		pr.URL, pr.MergedAt, pr.MergeCommit, string(commits))
+
+	return err
+}
+
+func (c *Cache) GetPR(number int) (*github.PR, error) {
+	var pr github.PR
+	var commitsJSON string
+
+	err := c.db.QueryRow(`
+		SELECT number, title, body, author, author_url, COALESCE(author_type, 'user'), url, merged_at, merge_commit, commits
+		FROM pull_requests WHERE number = ?
+	`, number).Scan(
+		&pr.Number, &pr.Title, &pr.Body, &pr.Author, &pr.AuthorURL, &pr.AuthorType,
+		&pr.URL, &pr.MergedAt, &pr.MergeCommit, &commitsJSON,
+	)
+
+	if err == sql.ErrNoRows {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	if err := json.Unmarshal([]byte(commitsJSON), &pr.Commits); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal commits: %w", err)
+	}
+
+	return &pr, nil
+}
+
+func (c *Cache) GetVersions() (map[string]*git.Version, error) {
+	rows, err := c.db.Query(`
+		SELECT name, date, commit_sha, pr_numbers, ai_summary FROM versions
+	`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	versions := make(map[string]*git.Version)
+
+	for rows.Next() {
+		var v git.Version
+		var dateStr sql.NullString
+		var prNumbersJSON string
+		var aiSummary sql.NullString
+
+		if err := rows.Scan(&v.Name, &dateStr, &v.CommitSHA, &prNumbersJSON, &aiSummary); err != nil {
+			return nil, err
+		}
+
+		if dateStr.Valid {
+			v.Date, _ = time.Parse(time.RFC3339, dateStr.String)
+		}
+
+		if prNumbersJSON != "" {
+			json.Unmarshal([]byte(prNumbersJSON), &v.PRNumbers)
+		}
+
+		if aiSummary.Valid {
+			v.AISummary = aiSummary.String
+		}
+
+		v.Commits, err = c.getCommitsForVersion(v.Name)
+		if err != nil {
+			return nil, err
+		}
+
+		versions[v.Name] = &v
+	}
+
+	return versions, rows.Err()
+}
+
+func (c *Cache) getCommitsForVersion(version string) ([]*git.Commit, error) {
+	rows, err := c.db.Query(`
+		SELECT sha, message, author, email, date, is_merge, pr_number
+		FROM commits WHERE version = ?
+		ORDER BY date DESC
+	`, version)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var commits []*git.Commit
+
+	for rows.Next() {
+		var commit git.Commit
+		if err := rows.Scan(
+			&commit.SHA, &commit.Message, &commit.Author, &commit.Email,
+			&commit.Date, &commit.IsMerge, &commit.PRNumber,
+		); err != nil {
+			return nil, err
+		}
+		commits = append(commits, &commit)
+	}
+
+	return commits, rows.Err()
+}
+
+func (c *Cache) Clear() error {
+	tables := []string{"metadata", "versions", "commits", "pull_requests"}
+	for _, table := range tables {
+		if _, err := c.db.Exec("DELETE FROM " + table); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// GetLastPRSync returns the timestamp of the last PR sync
+func (c *Cache) GetLastPRSync() (time.Time, error) {
+	var timestamp string
+	err := c.db.QueryRow("SELECT value FROM metadata WHERE key = 'last_pr_sync'").Scan(&timestamp)
+	if err == sql.ErrNoRows {
+		return time.Time{}, nil
+	}
+	if err != nil {
+		return time.Time{}, err
+	}
+
+	return time.Parse(time.RFC3339, timestamp)
+}
+
+// SetLastPRSync updates the timestamp of the last PR sync
+func (c *Cache) SetLastPRSync(timestamp time.Time) error {
+	_, err := c.db.Exec(`
+		INSERT OR REPLACE INTO metadata (key, value, updated_at)
+		VALUES ('last_pr_sync', ?, CURRENT_TIMESTAMP)
+	`, timestamp.Format(time.RFC3339))
+	return err
+}
+
+// SavePRBatch saves multiple PRs in a single transaction for better performance
+func (c *Cache) SavePRBatch(prs []*github.PR) error {
+	tx, err := c.db.Begin()
+	if err != nil {
+		return fmt.Errorf("failed to begin transaction: %w", err)
+	}
+	defer tx.Rollback()
+
+	stmt, err := tx.Prepare(`
+		INSERT OR REPLACE INTO pull_requests
+		(number, title, body, author, author_url, author_type, url, merged_at, merge_commit, commits)
+		VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+	`)
+	if err != nil {
+		return fmt.Errorf("failed to prepare statement: %w", err)
+	}
+	defer stmt.Close()
+
+	for _, pr := range prs {
+		commits, _ := json.Marshal(pr.Commits)
+		_, err := stmt.Exec(
+			pr.Number, pr.Title, pr.Body, pr.Author, pr.AuthorURL, pr.AuthorType,
+			pr.URL, pr.MergedAt, pr.MergeCommit, string(commits),
+		)
+		if err != nil {
+			return fmt.Errorf("failed to save PR #%d: %w", pr.Number, err)
+		}
+	}
+
+	return tx.Commit()
+}
+
+// GetAllPRs returns all cached PRs
+func (c *Cache) GetAllPRs() (map[int]*github.PR, error) {
+	rows, err := c.db.Query(`
+		SELECT number, title, body, author, author_url, COALESCE(author_type, 'user'), url, merged_at, merge_commit, commits
+		FROM pull_requests
+	`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	prs := make(map[int]*github.PR)
+
+	for rows.Next() {
+		var pr github.PR
+		var commitsJSON string
+
+		if err := rows.Scan(
+			&pr.Number, &pr.Title, &pr.Body, &pr.Author, &pr.AuthorURL, &pr.AuthorType,
+			&pr.URL, &pr.MergedAt, &pr.MergeCommit, &commitsJSON,
+		); err != nil {
+			return nil, err
+		}
+
+		if err := json.Unmarshal([]byte(commitsJSON), &pr.Commits); err != nil {
+			return nil, fmt.Errorf("failed to unmarshal commits for PR #%d: %w", pr.Number, err)
+		}
+
+		prs[pr.Number] = &pr
+	}
+
+	return prs, rows.Err()
+}
+
+// MarkPRAsNonExistent marks a PR number as non-existent to avoid future fetches
+func (c *Cache) MarkPRAsNonExistent(prNumber int) error {
+	_, err := c.db.Exec(`
+		INSERT OR REPLACE INTO metadata (key, value, updated_at)
+		VALUES (?, 'non_existent', CURRENT_TIMESTAMP)
+	`, fmt.Sprintf("pr_non_existent_%d", prNumber))
+	return err
+}
+
+// IsPRMarkedAsNonExistent checks if a PR is marked as non-existent
+func (c *Cache) IsPRMarkedAsNonExistent(prNumber int) bool {
+	var value string
+	err := c.db.QueryRow("SELECT value FROM metadata WHERE key = ?",
+		fmt.Sprintf("pr_non_existent_%d", prNumber)).Scan(&value)
+	return err == nil && value == "non_existent"
+}
+
+// SaveCommitPRMappings saves SHA→PR mappings for all commits in PRs
+func (c *Cache) SaveCommitPRMappings(prs []*github.PR) error {
+	tx, err := c.db.Begin()
+	if err != nil {
+		return fmt.Errorf("failed to begin transaction: %w", err)
+	}
+	defer tx.Rollback()
+
+	stmt, err := tx.Prepare(`
+		INSERT OR REPLACE INTO commit_pr_mapping (commit_sha, pr_number)
+		VALUES (?, ?)
+	`)
+	if err != nil {
+		return fmt.Errorf("failed to prepare statement: %w", err)
+	}
+	defer stmt.Close()
+
+	for _, pr := range prs {
+		for _, commit := range pr.Commits {
+			_, err := stmt.Exec(commit.SHA, pr.Number)
+			if err != nil {
+				return fmt.Errorf("failed to save commit mapping %s→%d: %w", commit.SHA, pr.Number, err)
+			}
+		}
+	}
+
+	return tx.Commit()
+}
+
+// GetPRNumberBySHA returns the PR number for a given commit SHA
+func (c *Cache) GetPRNumberBySHA(sha string) (int, bool) {
+	var prNumber int
+	err := c.db.QueryRow("SELECT pr_number FROM commit_pr_mapping WHERE commit_sha = ?", sha).Scan(&prNumber)
+	if err == sql.ErrNoRows {
+		return 0, false
+	}
+	if err != nil {
+		return 0, false
+	}
+	return prNumber, true
+}
+
+// GetCommitSHAsForPR returns all commit SHAs for a given PR number
+func (c *Cache) GetCommitSHAsForPR(prNumber int) ([]string, error) {
+	rows, err := c.db.Query("SELECT commit_sha FROM commit_pr_mapping WHERE pr_number = ?", prNumber)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var shas []string
+	for rows.Next() {
+		var sha string
+		if err := rows.Scan(&sha); err != nil {
+			return nil, err
+		}
+		shas = append(shas, sha)
+	}
+
+	return shas, rows.Err()
+}
+
+// GetUnreleasedContentHash returns the cached content hash for Unreleased
+func (c *Cache) GetUnreleasedContentHash() (string, error) {
+	var hash string
+	err := c.db.QueryRow("SELECT value FROM metadata WHERE key = 'unreleased_content_hash'").Scan(&hash)
+	if err == sql.ErrNoRows {
+		return "", fmt.Errorf("no content hash found")
+	}
+	return hash, err
+}
+
+// SetUnreleasedContentHash stores the content hash for Unreleased
+func (c *Cache) SetUnreleasedContentHash(hash string) error {
+	_, err := c.db.Exec(`
+		INSERT OR REPLACE INTO metadata (key, value, updated_at)
+		VALUES ('unreleased_content_hash', ?, CURRENT_TIMESTAMP)
+	`, hash)
+	return err
+}

cmd/generate_changelog/internal/changelog/generator.go

@@ -0,0 +1,681 @@
+package changelog
+
+import (
+	"crypto/sha256"
+	"fmt"
+	"os"
+	"regexp"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/danielmiessler/fabric/cmd/generate_changelog/internal/cache"
+	"github.com/danielmiessler/fabric/cmd/generate_changelog/internal/config"
+	"github.com/danielmiessler/fabric/cmd/generate_changelog/internal/git"
+	"github.com/danielmiessler/fabric/cmd/generate_changelog/internal/github"
+)
+
+type Generator struct {
+	cfg       *config.Config
+	gitWalker *git.Walker
+	ghClient  *github.Client
+	cache     *cache.Cache
+	versions  map[string]*git.Version
+	prs       map[int]*github.PR
+}
+
+func New(cfg *config.Config) (*Generator, error) {
+	gitWalker, err := git.NewWalker(cfg.RepoPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create git walker: %w", err)
+	}
+
+	owner, repo, err := gitWalker.GetRepoInfo()
+	if err != nil {
+		return nil, fmt.Errorf("failed to get repo info: %w", err)
+	}
+
+	ghClient := github.NewClient(cfg.GitHubToken, owner, repo)
+
+	var c *cache.Cache
+	if !cfg.NoCache {
+		c, err = cache.New(cfg.CacheFile)
+		if err != nil {
+			return nil, fmt.Errorf("failed to create cache: %w", err)
+		}
+
+		if cfg.RebuildCache {
+			if err := c.Clear(); err != nil {
+				return nil, fmt.Errorf("failed to clear cache: %w", err)
+			}
+		}
+	}
+
+	return &Generator{
+		cfg:       cfg,
+		gitWalker: gitWalker,
+		ghClient:  ghClient,
+		cache:     c,
+		prs:       make(map[int]*github.PR),
+	}, nil
+}
+
+func (g *Generator) Generate() (string, error) {
+	if err := g.collectData(); err != nil {
+		return "", fmt.Errorf("failed to collect data: %w", err)
+	}
+
+	if err := g.fetchPRs(); err != nil {
+		return "", fmt.Errorf("failed to fetch PRs: %w", err)
+	}
+
+	return g.formatChangelog(), nil
+}
+
+func (g *Generator) collectData() error {
+	if g.cache != nil && !g.cfg.RebuildCache {
+		cachedTag, err := g.cache.GetLastProcessedTag()
+		if err != nil {
+			return fmt.Errorf("failed to get last processed tag: %w", err)
+		}
+
+		if cachedTag != "" {
+			// Get the current latest tag from git
+			currentTag, err := g.gitWalker.GetLatestTag()
+			if err == nil {
+				// Load cached data - we can use it even if there are new tags
+				cachedVersions, err := g.cache.GetVersions()
+				if err == nil && len(cachedVersions) > 0 {
+					g.versions = cachedVersions
+
+					// Load cached PRs
+					for _, version := range g.versions {
+						for _, prNum := range version.PRNumbers {
+							if pr, err := g.cache.GetPR(prNum); err == nil && pr != nil {
+								g.prs[prNum] = pr
+							}
+						}
+					}
+
+					// If we have new tags since cache, process the new versions only
+					if currentTag != cachedTag {
+						fmt.Fprintf(os.Stderr, "Processing new versions since %s...\n", cachedTag)
+						newVersions, err := g.gitWalker.WalkHistorySinceTag(cachedTag)
+						if err != nil {
+							fmt.Fprintf(os.Stderr, "Warning: Failed to walk history since tag %s: %v\n", cachedTag, err)
+						} else {
+							// Merge new versions into cached versions (only add if not already cached)
+							for name, version := range newVersions {
+								if name != "Unreleased" { // Handle Unreleased separately
+									if existingVersion, exists := g.versions[name]; !exists {
+										g.versions[name] = version
+									} else {
+										// Update existing version with new PR numbers if they're missing
+										if len(existingVersion.PRNumbers) == 0 && len(version.PRNumbers) > 0 {
+											existingVersion.PRNumbers = version.PRNumbers
+										}
+									}
+								}
+							}
+						}
+					}
+
+					// Always update Unreleased section with latest commits
+					unreleasedVersion, err := g.gitWalker.WalkCommitsSinceTag(currentTag)
+					if err != nil {
+						fmt.Fprintf(os.Stderr, "Warning: Failed to walk commits since tag %s: %v\n", currentTag, err)
+					} else if unreleasedVersion != nil {
+						// Preserve existing AI summary if available
+						if existingUnreleased, exists := g.versions["Unreleased"]; exists {
+							unreleasedVersion.AISummary = existingUnreleased.AISummary
+						}
+						// Replace or add the unreleased version
+						g.versions["Unreleased"] = unreleasedVersion
+					}
+
+					// Save any new versions to cache (after potential AI processing)
+					if currentTag != cachedTag {
+						for _, version := range g.versions {
+							// Skip versions that were already cached and Unreleased
+							if version.Name != "Unreleased" {
+								if err := g.cache.SaveVersion(version); err != nil {
+									fmt.Fprintf(os.Stderr, "Warning: Failed to save version to cache: %v\n", err)
+								}
+
+								for _, commit := range version.Commits {
+									if err := g.cache.SaveCommit(commit, version.Name); err != nil {
+										fmt.Fprintf(os.Stderr, "Warning: Failed to save commit to cache: %v\n", err)
+									}
+								}
+							}
+						}
+
+						// Update the last processed tag
+						if err := g.cache.SetLastProcessedTag(currentTag); err != nil {
+							fmt.Fprintf(os.Stderr, "Warning: Failed to update last processed tag: %v\n", err)
+						}
+					}
+
+					return nil
+				}
+			}
+		}
+	}
+
+	versions, err := g.gitWalker.WalkHistory()
+	if err != nil {
+		return fmt.Errorf("failed to walk history: %w", err)
+	}
+
+	g.versions = versions
+
+	if g.cache != nil {
+		for _, version := range versions {
+			if err := g.cache.SaveVersion(version); err != nil {
+				return fmt.Errorf("failed to save version to cache: %w", err)
+			}
+
+			for _, commit := range version.Commits {
+				if err := g.cache.SaveCommit(commit, version.Name); err != nil {
+					return fmt.Errorf("failed to save commit to cache: %w", err)
+				}
+			}
+		}
+
+		// Save the latest tag as our cache anchor point
+		if latestTag, err := g.gitWalker.GetLatestTag(); err == nil && latestTag != "" {
+			if err := g.cache.SetLastProcessedTag(latestTag); err != nil {
+				return fmt.Errorf("failed to save last processed tag: %w", err)
+			}
+		}
+	}
+
+	return nil
+}
+
+func (g *Generator) fetchPRs() error {
+	// First, load all cached PRs
+	if g.cache != nil {
+		cachedPRs, err := g.cache.GetAllPRs()
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Warning: Failed to load cached PRs: %v\n", err)
+		} else {
+			g.prs = cachedPRs
+		}
+	}
+
+	// Check if we need to fetch new PRs
+	var lastSync time.Time
+	if g.cache != nil {
+		lastSync, _ = g.cache.GetLastPRSync()
+	}
+
+	// If we have never synced or it's been more than 24 hours, do a full sync
+	needsSync := lastSync.IsZero() || time.Since(lastSync) > 24*time.Hour || g.cfg.ForcePRSync
+
+	if !needsSync {
+		fmt.Fprintf(os.Stderr, "Using cached PR data (last sync: %s)\n", lastSync.Format("2006-01-02 15:04:05"))
+		return nil
+	}
+
+	fmt.Fprintf(os.Stderr, "Fetching merged PRs from GitHub using GraphQL...\n")
+
+	// Use GraphQL for ultimate performance - gets everything in ~5-10 calls
+	prs, err := g.ghClient.FetchAllMergedPRsGraphQL(lastSync)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "GraphQL fetch failed, falling back to REST API: %v\n", err)
+		// Fall back to REST API
+		prs, err = g.ghClient.FetchAllMergedPRs(lastSync)
+		if err != nil {
+			return fmt.Errorf("both GraphQL and REST API failed: %w", err)
+		}
+	}
+
+	// Update our PR map with new data
+	for _, pr := range prs {
+		g.prs[pr.Number] = pr
+	}
+
+	// Save all PRs to cache in a batch transaction
+	if g.cache != nil && len(prs) > 0 {
+		// Save PRs
+		if err := g.cache.SavePRBatch(prs); err != nil {
+			fmt.Fprintf(os.Stderr, "Warning: Failed to cache PRs: %v\n", err)
+		}
+
+		// Save SHA→PR mappings for lightning-fast git operations
+		if err := g.cache.SaveCommitPRMappings(prs); err != nil {
+			fmt.Fprintf(os.Stderr, "Warning: Failed to cache commit mappings: %v\n", err)
+		}
+
+		// Update last sync timestamp
+		if err := g.cache.SetLastPRSync(time.Now()); err != nil {
+			fmt.Fprintf(os.Stderr, "Warning: Failed to update last sync timestamp: %v\n", err)
+		}
+	}
+
+	if len(prs) > 0 {
+		fmt.Fprintf(os.Stderr, "Fetched %d PRs with commits (total cached: %d)\n", len(prs), len(g.prs))
+	}
+
+	return nil
+}
+
+func (g *Generator) formatChangelog() string {
+	var sb strings.Builder
+	sb.WriteString("# Changelog\n")
+
+	versionList := g.getSortedVersions()
+
+	for _, version := range versionList {
+		if g.cfg.Version != "" && version.Name != g.cfg.Version {
+			continue
+		}
+
+		versionText := g.formatVersion(version)
+		if versionText != "" {
+			sb.WriteString("\n")
+			sb.WriteString(versionText)
+		}
+	}
+
+	return sb.String()
+}
+
+func (g *Generator) getSortedVersions() []*git.Version {
+	var versions []*git.Version
+	var releasedVersions []*git.Version
+
+	// Collect all released versions (non-"Unreleased")
+	for name, version := range g.versions {
+		if name != "Unreleased" {
+			releasedVersions = append(releasedVersions, version)
+		}
+	}
+
+	// Sort released versions by date (newest first)
+	sort.Slice(releasedVersions, func(i, j int) bool {
+		return releasedVersions[i].Date.After(releasedVersions[j].Date)
+	})
+
+	// Add "Unreleased" first if it exists and has commits
+	if unreleased, exists := g.versions["Unreleased"]; exists && len(unreleased.Commits) > 0 {
+		versions = append(versions, unreleased)
+	}
+
+	// Add sorted released versions
+	versions = append(versions, releasedVersions...)
+
+	if g.cfg.Limit > 0 && len(versions) > g.cfg.Limit {
+		versions = versions[:g.cfg.Limit]
+	}
+
+	return versions
+}
+
+func (g *Generator) formatVersion(version *git.Version) string {
+	var sb strings.Builder
+
+	// Generate raw content
+	rawContent := g.generateRawVersionContent(version)
+	if rawContent == "" {
+		return ""
+	}
+
+	header := g.formatVersionHeader(version)
+	sb.WriteString(("\n"))
+	sb.WriteString(header)
+
+	// If AI summarization is enabled, enhance with AI
+	if g.cfg.EnableAISummary {
+		// For "Unreleased", check if content has changed since last AI summary
+		if version.Name == "Unreleased" && version.AISummary != "" && g.cache != nil {
+			// Get cached content hash
+			cachedHash, err := g.cache.GetUnreleasedContentHash()
+			if err == nil {
+				// Calculate current content hash
+				currentHash := hashContent(rawContent)
+				if cachedHash == currentHash {
+					// Content unchanged, use cached summary
+					fmt.Fprintf(os.Stderr, "✅ %s content unchanged (skipping AI)\n", version.Name)
+					sb.WriteString(version.AISummary)
+					return fixMarkdown(sb.String())
+				}
+			}
+		}
+
+		// For released versions, if we have cached AI summary, use it!
+		if version.Name != "Unreleased" && version.AISummary != "" {
+			fmt.Fprintf(os.Stderr, "✅ %s already summarized (skipping)\n", version.Name)
+			sb.WriteString(version.AISummary)
+			return fixMarkdown(sb.String())
+		}
+
+		fmt.Fprintf(os.Stderr, "🤖 AI summarizing %s...", version.Name)
+
+		aiSummary, err := SummarizeVersionContent(rawContent)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, " Failed: %v\n", err)
+			sb.WriteString((rawContent))
+			return fixMarkdown(sb.String())
+		}
+		if checkForAIError(aiSummary) {
+			fmt.Fprintf(os.Stderr, " AI error detected, using raw content instead\n")
+			sb.WriteString(rawContent)
+			fmt.Fprintf(os.Stderr, "Raw Content was: (%d bytes) %s \n", len(rawContent), rawContent)
+			fmt.Fprintf(os.Stderr, "AI Summary was: (%d bytes) %s\n", len(aiSummary), aiSummary)
+			return fixMarkdown(sb.String())
+		}
+
+		fmt.Fprintf(os.Stderr, " Done!\n")
+		aiSummary = strings.TrimSpace(aiSummary)
+
+		// Cache the AI summary and content hash
+		version.AISummary = aiSummary
+		if g.cache != nil {
+			if err := g.cache.UpdateVersionAISummary(version.Name, aiSummary); err != nil {
+				fmt.Fprintf(os.Stderr, "Warning: Failed to cache AI summary: %v\n", err)
+			}
+			// Cache content hash for "Unreleased" to detect changes
+			if version.Name == "Unreleased" {
+				if err := g.cache.SetUnreleasedContentHash(hashContent(rawContent)); err != nil {
+					fmt.Fprintf(os.Stderr, "Warning: Failed to cache content hash: %v\n", err)
+				}
+			}
+		}
+
+		sb.WriteString(aiSummary)
+		return fixMarkdown(sb.String())
+	}
+
+	sb.WriteString(rawContent)
+	return fixMarkdown(sb.String())
+}
+
+func checkForAIError(summary string) bool {
+	// Check for common AI error patterns
+	errorPatterns := []string{
+		"I don't see any", "please provide",
+		"content you've provided appears to be incomplete",
+	}
+
+	for _, pattern := range errorPatterns {
+		if strings.Contains(summary, pattern) {
+			return true
+		}
+	}
+
+	return false
+}
+
+// formatVersionHeader formats just the version header (## ...)
+func (g *Generator) formatVersionHeader(version *git.Version) string {
+	if version.Name == "Unreleased" {
+		return "## Unreleased\n\n"
+	}
+	return fmt.Sprintf("\n## %s (%s)\n\n", version.Name, version.Date.Format("2006-01-02"))
+}
+
+// generateRawVersionContent generates the raw content (PRs + commits) for a version
+func (g *Generator) generateRawVersionContent(version *git.Version) string {
+	var sb strings.Builder
+
+	// Build a set of commit SHAs that are part of fetched PRs
+	prCommitSHAs := make(map[string]bool)
+	for _, prNum := range version.PRNumbers {
+		if pr, exists := g.prs[prNum]; exists {
+			for _, prCommit := range pr.Commits {
+				prCommitSHAs[prCommit.SHA] = true
+			}
+		}
+	}
+
+	prCommits := make(map[int][]*git.Commit)
+	directCommits := []*git.Commit{}
+
+	for _, commit := range version.Commits {
+		// Skip version bump commits from output
+		if commit.IsVersion {
+			continue
+		}
+
+		// If this commit is part of a fetched PR, don't include it in direct commits
+		if prCommitSHAs[commit.SHA] {
+			continue
+		}
+
+		if commit.PRNumber > 0 {
+			prCommits[commit.PRNumber] = append(prCommits[commit.PRNumber], commit)
+		} else {
+			directCommits = append(directCommits, commit)
+		}
+	}
+
+	// There are occasionally no PRs or direct commits other than version bumps, so we handle that gracefully
+	if len(prCommits) == 0 && len(directCommits) == 0 {
+		return ""
+	}
+
+	prependNewline := ""
+	for _, prNum := range version.PRNumbers {
+		if pr, exists := g.prs[prNum]; exists {
+			sb.WriteString(prependNewline)
+			sb.WriteString(g.formatPR(pr))
+			prependNewline = "\n"
+		}
+	}
+
+	if len(directCommits) > 0 {
+		// Sort direct commits by date (newest first) for consistent ordering
+		sort.Slice(directCommits, func(i, j int) bool {
+			return directCommits[i].Date.After(directCommits[j].Date)
+		})
+
+		sb.WriteString(prependNewline + "### Direct commits\n\n")
+		for _, commit := range directCommits {
+			message := g.formatCommitMessage(strings.TrimSpace(commit.Message))
+			if message != "" && !g.isDuplicateMessage(message, directCommits) {
+				sb.WriteString(fmt.Sprintf("- %s\n", message))
+			}
+		}
+	}
+
+	return fixMarkdown(
+		strings.ReplaceAll(sb.String(), "\n-\n", "\n"), // Remove empty list items
+	)
+}
+
+func fixMarkdown(content string) string {
+
+	// Fix MD032/blank-around-lists: Lists should be surrounded by blank lines
+	lines := strings.Split(content, "\n")
+	inList := false
+	preListNewline := false
+	for i := range lines {
+		line := strings.TrimSpace(lines[i])
+		if strings.HasPrefix(line, "- ") || strings.HasPrefix(line, "* ") {
+			if !inList {
+				inList = true
+				// Ensure there's a blank line before the list starts
+				if !preListNewline && i > 0 && lines[i-1] != "" {
+					line = "\n" + line
+					preListNewline = true
+				}
+			}
+		} else {
+			if inList {
+				inList = false
+				preListNewline = false
+			}
+		}
+		lines[i] = strings.TrimRight(line, " \t")
+	}
+
+	fixedContent := strings.TrimSpace(strings.Join(lines, "\n"))
+
+	return fixedContent + "\n"
+}
+
+func (g *Generator) formatPR(pr *github.PR) string {
+	var sb strings.Builder
+
+	pr.Title = strings.TrimRight(strings.TrimSpace(pr.Title), ".")
+
+	// Add type indicator for non-users
+	authorName := pr.Author
+	switch pr.AuthorType {
+	case "bot":
+		authorName += "[bot]"
+	case "organization":
+		authorName += "[org]"
+	}
+
+	sb.WriteString(fmt.Sprintf("### PR [#%d](%s) by [%s](%s): %s\n\n",
+		pr.Number, pr.URL, authorName, pr.AuthorURL, strings.TrimSpace(pr.Title)))
+
+	changes := g.extractChanges(pr)
+	for _, change := range changes {
+		if change != "" {
+			sb.WriteString(fmt.Sprintf("- %s\n", change))
+		}
+	}
+
+	return sb.String()
+}
+
+func (g *Generator) extractChanges(pr *github.PR) []string {
+	var changes []string
+	seen := make(map[string]bool)
+
+	for _, commit := range pr.Commits {
+		message := g.formatCommitMessage(commit.Message)
+		if message != "" && !seen[message] {
+			seen[message] = true
+			changes = append(changes, message)
+		}
+	}
+
+	if len(changes) == 0 && pr.Body != "" {
+		lines := strings.Split(pr.Body, "\n")
+		for _, line := range lines {
+			line = strings.TrimSpace(line)
+			if strings.HasPrefix(line, "- ") || strings.HasPrefix(line, "* ") {
+				change := strings.TrimPrefix(strings.TrimPrefix(line, "- "), "* ")
+				if change != "" {
+					changes = append(changes, change)
+				}
+			}
+		}
+	}
+
+	return changes
+}
+
+func normalizeLineEndings(content string) string {
+	return strings.ReplaceAll(content, "\r\n", "\n")
+}
+
+func (g *Generator) formatCommitMessage(message string) string {
+	strings_to_remove := []string{
+		"### CHANGES\n", "## CHANGES\n", "# CHANGES\n",
+		"...\n", "---\n", "## Changes\n", "## Change",
+		"Update version to v..1 and commit\n",
+		"# What this Pull Request (PR) does\n",
+		"# Conflicts:",
+	}
+
+	message = normalizeLineEndings(message)
+	// No hard tabs
+	message = strings.ReplaceAll(message, "\t", " ")
+
+	if len(message) > 0 {
+		message = strings.ToUpper(message[:1]) + message[1:]
+	}
+
+	for _, str := range strings_to_remove {
+		if strings.Contains(message, str) {
+			message = strings.ReplaceAll(message, str, "")
+		}
+	}
+
+	message = fixFormatting(message)
+
+	return message
+}
+
+func fixFormatting(message string) string {
+	// Turn "*"" lists into "-" lists"
+	message = strings.ReplaceAll(message, "* ", "- ")
+	// Remove extra spaces around dashes
+	message = strings.ReplaceAll(message, "-   ", "- ")
+	message = strings.ReplaceAll(message, "-  ", "- ")
+	// turn bare URL into <URL>
+	if strings.Contains(message, "http://") || strings.Contains(message, "https://") {
+		// Use regex to wrap bare URLs with angle brackets
+		urlRegex := regexp.MustCompile(`\b(https?://[^\s<>]+)`)
+		message = urlRegex.ReplaceAllString(message, "<$1>")
+	}
+
+	// Replace "## LINKS\n" with "- "
+	message = strings.ReplaceAll(message, "## LINKS\n", "- ")
+	// Dependabot messages: "- [Commits]" should become "\n- [Commits]"
+	message = strings.TrimSpace(message)
+	// Turn multiple newlines into a single newline
+	message = strings.TrimSpace(strings.ReplaceAll(message, "\n\n", "\n"))
+	// Fix inline trailing spaces
+	message = strings.ReplaceAll(message, " \n", "\n")
+	// Fix weird indent before list,
+	message = strings.ReplaceAll(message, "\n - ", "\n- ")
+
+	// blanks-around-lists MD032 fix
+	// Use regex to ensure blank line before list items that don't already have one
+	listRegex := regexp.MustCompile(`(?m)([^\n-].*[^:\n])\n([-*] .*)`)
+	message = listRegex.ReplaceAllString(message, "$1\n\n$2")
+
+	// Change random first-level "#" to 4th level "####"
+	// This is a hack to fix spurious first-level headings that are not actual headings
+	// but rather just comments or notes in the commit message.
+	message = strings.ReplaceAll(message, "# ", "\n#### ")
+	message = strings.ReplaceAll(message, "\n\n\n", "\n\n")
+
+	// Wrap any non-wrapped Emails with angle brackets
+	emailRegex := regexp.MustCompile(`([a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,})`)
+	message = emailRegex.ReplaceAllString(message, "<$1>")
+
+	// Wrap any non-wrapped URLs with angle brackets
+	urlRegex := regexp.MustCompile(`(https?://[^\s<]+)`)
+	message = urlRegex.ReplaceAllString(message, "<$1>")
+
+	message = strings.ReplaceAll(message, "<<", "<")
+	message = strings.ReplaceAll(message, ">>", ">")
+
+	// Fix some spurious Issue/PR links at the beginning of a commit message line
+	prOrIssueLinkRegex := regexp.MustCompile("\n" + `(#\d+)`)
+	message = prOrIssueLinkRegex.ReplaceAllString(message, " $1")
+
+	// Remove leading/trailing whitespace
+	message = strings.TrimSpace(message)
+	return message
+}
+
+func (g *Generator) isDuplicateMessage(message string, commits []*git.Commit) bool {
+	if message == "." || strings.ToLower(message) == "fix" {
+		count := 0
+		for _, commit := range commits {
+			formatted := g.formatCommitMessage(commit.Message)
+			if formatted == message {
+				count++
+				if count > 1 {
+					return true
+				}
+			}
+		}
+	}
+	return false
+}
+
+// hashContent generates a SHA256 hash of the content for change detection
+func hashContent(content string) string {
+	hash := sha256.Sum256([]byte(content))
+	return fmt.Sprintf("%x", hash)
+}

cmd/generate_changelog/internal/changelog/summarize.go

@@ -0,0 +1,79 @@
+package changelog
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+const DefaultSummarizeModel = "claude-sonnet-4-20250514"
+const MinContentLength = 256 // Minimum content length to consider for summarization
+
+const prompt = `# ROLE
+You are an expert Technical Writer specializing in creating clear, concise,
+and professional release notes from raw Git commit logs.
+
+# TASK
+Your goal is to transform a provided block of Git commit logs into a clean,
+human-readable changelog summary. You will identify the most important changes,
+format them as a bulleted list, and preserve the associated Pull Request (PR)
+information.
+
+# INSTRUCTIONS:
+Follow these steps in order:
+1. Deeply analyze the input. You will be given a block of text containing PR
+   information and commit log messages. Carefully read through the logs
+   to identify individual commits and their descriptions.
+2. Identify Key Changes: Focus on commits that represent significant changes,
+   such as new features ("feat"), bug fixes ("fix"), performance improvements ("perf"),
+   or breaking changes ("BREAKING CHANGE").
+3. Select the Top 5: From the identified key changes, select a maximum of the five
+   (5) most impactful ones to include in the summary.
+   If there are five or fewer total changes, include all of them.
+4. Format the Output:
+    - Where you see a PR header, include the PR header verbatim. NO CHANGES.
+	  **This is a critical rule: Do not modify the PR header, as it contains
+	  important links.** What follow the PR header are the related changes.
+	- Do not add any additional text or preamble. Begin directly with the output.
+	- Use bullet points for each key change. Starting each point with a hyphen ("-").
+	- Ensure that the summary is concise and focused on the main changes.
+	- The summary should be in American English (en-US), using proper grammar and punctuation.
+5. If the content is too brief or you do not see any PR headers, return the content as is.
+`
+
+// getSummarizeModel returns the model to use for AI summarization
+func getSummarizeModel() string {
+	if model := os.Getenv("FABRIC_CHANGELOG_SUMMARIZE_MODEL"); model != "" {
+		return model
+	}
+	return DefaultSummarizeModel
+}
+
+// SummarizeVersionContent takes raw version content and returns AI-enhanced summary
+func SummarizeVersionContent(content string) (string, error) {
+	if strings.TrimSpace(content) == "" {
+		return "", fmt.Errorf("no content to summarize")
+	}
+	if len(content) < MinContentLength {
+		// If content is too brief, return it as is
+		return content, nil
+	}
+
+	model := getSummarizeModel()
+
+	cmd := exec.Command("fabric", "-m", model, prompt)
+	cmd.Stdin = strings.NewReader(content)
+
+	output, err := cmd.Output()
+	if err != nil {
+		return "", fmt.Errorf("fabric command failed: %w", err)
+	}
+
+	summary := strings.TrimSpace(string(output))
+	if summary == "" {
+		return "", fmt.Errorf("fabric returned empty summary")
+	}
+
+	return summary, nil
+}

cmd/generate_changelog/internal/config/config.go

@@ -0,0 +1,15 @@
+package config
+
+type Config struct {
+	RepoPath        string
+	OutputFile      string
+	Limit           int
+	Version         string
+	SaveData        bool
+	CacheFile       string
+	NoCache         bool
+	RebuildCache    bool
+	GitHubToken     string
+	ForcePRSync     bool
+	EnableAISummary bool
+}

cmd/generate_changelog/internal/git/types.go

@@ -0,0 +1,26 @@
+package git
+
+import (
+	"time"
+)
+
+type Commit struct {
+	SHA       string
+	Message   string
+	Author    string
+	Email     string
+	Date      time.Time
+	IsMerge   bool
+	PRNumber  int
+	IsVersion bool
+	Version   string
+}
+
+type Version struct {
+	Name      string
+	Date      time.Time
+	CommitSHA string
+	Commits   []*Commit
+	PRNumbers []int
+	AISummary string
+}

cmd/generate_changelog/internal/git/walker.go

@@ -0,0 +1,402 @@
+package git
+
+import (
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/go-git/go-git/v5"
+	"github.com/go-git/go-git/v5/plumbing"
+	"github.com/go-git/go-git/v5/plumbing/object"
+	"github.com/go-git/go-git/v5/plumbing/storer"
+)
+
+var (
+	versionPattern = regexp.MustCompile(`Update version to (v\d+\.\d+\.\d+)`)
+	prPattern      = regexp.MustCompile(`Merge pull request #(\d+)`)
+)
+
+type Walker struct {
+	repo *git.Repository
+}
+
+func NewWalker(repoPath string) (*Walker, error) {
+	repo, err := git.PlainOpen(repoPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open repository: %w", err)
+	}
+
+	return &Walker{repo: repo}, nil
+}
+
+// GetLatestTag returns the name of the most recent tag by committer date
+func (w *Walker) GetLatestTag() (string, error) {
+	tagRefs, err := w.repo.Tags()
+	if err != nil {
+		return "", err
+	}
+
+	var latestTagCommit *object.Commit
+	var latestTagName string
+
+	err = tagRefs.ForEach(func(tagRef *plumbing.Reference) error {
+		revision := plumbing.Revision(tagRef.Name().String())
+		tagCommitHash, err := w.repo.ResolveRevision(revision)
+		if err != nil {
+			return err
+		}
+
+		commit, err := w.repo.CommitObject(*tagCommitHash)
+		if err != nil {
+			return err
+		}
+
+		if latestTagCommit == nil {
+			latestTagCommit = commit
+			latestTagName = tagRef.Name().Short() // Get short name like "v1.4.245"
+		}
+
+		if commit.Committer.When.After(latestTagCommit.Committer.When) {
+			latestTagCommit = commit
+			latestTagName = tagRef.Name().Short()
+		}
+
+		return nil
+	})
+	if err != nil {
+		return "", err
+	}
+
+	return latestTagName, nil
+}
+
+// WalkCommitsSinceTag walks commits from the specified tag to HEAD and returns only "Unreleased" version
+func (w *Walker) WalkCommitsSinceTag(tagName string) (*Version, error) {
+	// Get the tag reference
+	tagRef, err := w.repo.Tag(tagName)
+	if err != nil {
+		return nil, fmt.Errorf("failed to find tag %s: %w", tagName, err)
+	}
+
+	// Get the commit that the tag points to
+	tagCommit, err := w.repo.CommitObject(tagRef.Hash())
+	if err != nil {
+		return nil, fmt.Errorf("failed to get tag commit: %w", err)
+	}
+
+	// Get HEAD
+	headRef, err := w.repo.Head()
+	if err != nil {
+		return nil, fmt.Errorf("failed to get HEAD: %w", err)
+	}
+
+	// Walk from HEAD back to the tag commit (exclusive)
+	commitIter, err := w.repo.Log(&git.LogOptions{
+		From:  headRef.Hash(),
+		Order: git.LogOrderCommitterTime,
+	})
+	if err != nil {
+		return nil, fmt.Errorf("failed to get commit log: %w", err)
+	}
+
+	version := &Version{
+		Name:    "Unreleased",
+		Commits: []*Commit{},
+	}
+
+	prNumbers := []int{}
+
+	err = commitIter.ForEach(func(c *object.Commit) error {
+		// Stop when we reach the tag commit (don't include it)
+		if c.Hash == tagCommit.Hash {
+			return fmt.Errorf("reached tag commit") // Use error to break out of iteration
+		}
+
+		commit := &Commit{
+			SHA:     c.Hash.String(),
+			Message: strings.TrimSpace(c.Message),
+			Date:    c.Committer.When,
+		}
+
+		// Check for version patterns
+		if versionMatch := versionPattern.FindStringSubmatch(commit.Message); versionMatch != nil {
+			commit.IsVersion = true
+		}
+
+		// Check for PR merge patterns
+		if prMatch := prPattern.FindStringSubmatch(commit.Message); prMatch != nil {
+			if prNumber, err := strconv.Atoi(prMatch[1]); err == nil {
+				commit.PRNumber = prNumber
+				prNumbers = append(prNumbers, prNumber)
+			}
+		}
+
+		version.Commits = append(version.Commits, commit)
+		return nil
+	})
+
+	// Ignore the "reached tag commit" error - it's expected
+	if err != nil && !strings.Contains(err.Error(), "reached tag commit") {
+		return nil, fmt.Errorf("failed to walk commits: %w", err)
+	}
+
+	// Remove duplicates from prNumbers and set them
+	prNumbersMap := make(map[int]bool)
+	for _, prNum := range prNumbers {
+		prNumbersMap[prNum] = true
+	}
+
+	version.PRNumbers = make([]int, 0, len(prNumbersMap))
+	for prNum := range prNumbersMap {
+		version.PRNumbers = append(version.PRNumbers, prNum)
+	}
+
+	return version, nil
+}
+
+func (w *Walker) WalkHistory() (map[string]*Version, error) {
+	ref, err := w.repo.Head()
+	if err != nil {
+		return nil, fmt.Errorf("failed to get HEAD: %w", err)
+	}
+
+	commitIter, err := w.repo.Log(&git.LogOptions{
+		From:  ref.Hash(),
+		Order: git.LogOrderCommitterTime,
+	})
+	if err != nil {
+		return nil, fmt.Errorf("failed to get commit log: %w", err)
+	}
+
+	versions := make(map[string]*Version)
+	currentVersion := "Unreleased"
+	versions[currentVersion] = &Version{
+		Name:    currentVersion,
+		Commits: []*Commit{},
+	}
+
+	prNumbers := make(map[string][]int)
+
+	err = commitIter.ForEach(func(c *object.Commit) error {
+		// c.Message = Summarize(c.Message)
+		commit := &Commit{
+			SHA:     c.Hash.String(),
+			Message: strings.TrimSpace(c.Message),
+			Author:  c.Author.Name,
+			Email:   c.Author.Email,
+			Date:    c.Author.When,
+			IsMerge: len(c.ParentHashes) > 1,
+		}
+
+		if matches := versionPattern.FindStringSubmatch(commit.Message); len(matches) > 1 {
+			commit.IsVersion = true
+			commit.Version = matches[1]
+			currentVersion = commit.Version
+
+			if _, exists := versions[currentVersion]; !exists {
+				versions[currentVersion] = &Version{
+					Name:      currentVersion,
+					Date:      commit.Date,
+					CommitSHA: commit.SHA,
+					Commits:   []*Commit{},
+				}
+			}
+			return nil
+		}
+
+		if matches := prPattern.FindStringSubmatch(commit.Message); len(matches) > 1 {
+			prNumber := 0
+			fmt.Sscanf(matches[1], "%d", &prNumber)
+			commit.PRNumber = prNumber
+
+			prNumbers[currentVersion] = append(prNumbers[currentVersion], prNumber)
+		}
+
+		versions[currentVersion].Commits = append(versions[currentVersion].Commits, commit)
+
+		return nil
+	})
+
+	if err != nil {
+		return nil, fmt.Errorf("failed to walk commits: %w", err)
+	}
+
+	for version, prs := range prNumbers {
+		versions[version].PRNumbers = dedupInts(prs)
+	}
+
+	return versions, nil
+}
+
+func (w *Walker) GetRepoInfo() (owner string, name string, err error) {
+	remotes, err := w.repo.Remotes()
+	if err != nil {
+		return "", "", fmt.Errorf("failed to get remotes: %w", err)
+	}
+
+	// First try upstream (preferred for forks)
+	for _, remote := range remotes {
+		if remote.Config().Name == "upstream" {
+			urls := remote.Config().URLs
+			if len(urls) > 0 {
+				owner, name = parseGitHubURL(urls[0])
+				if owner != "" && name != "" {
+					return owner, name, nil
+				}
+			}
+		}
+	}
+
+	// Then try origin
+	for _, remote := range remotes {
+		if remote.Config().Name == "origin" {
+			urls := remote.Config().URLs
+			if len(urls) > 0 {
+				owner, name = parseGitHubURL(urls[0])
+				if owner != "" && name != "" {
+					return owner, name, nil
+				}
+			}
+		}
+	}
+
+	return "danielmiessler", "fabric", nil
+}
+
+func parseGitHubURL(url string) (owner, repo string) {
+	patterns := []string{
+		`github\.com[:/]([^/]+)/([^/.]+)`,
+		`github\.com[:/]([^/]+)/([^/]+)\.git$`,
+	}
+
+	for _, pattern := range patterns {
+		re := regexp.MustCompile(pattern)
+		matches := re.FindStringSubmatch(url)
+		if len(matches) > 2 {
+			return matches[1], matches[2]
+		}
+	}
+
+	return "", ""
+}
+
+// WalkHistorySinceTag walks git history from HEAD down to (but not including) the specified tag
+// and returns any version commits found along the way
+func (w *Walker) WalkHistorySinceTag(sinceTag string) (map[string]*Version, error) {
+	// Get the commit SHA for the sinceTag
+	tagRef, err := w.repo.Tag(sinceTag)
+	if err != nil {
+		return nil, fmt.Errorf("failed to get tag %s: %w", sinceTag, err)
+	}
+
+	tagCommit, err := w.repo.CommitObject(tagRef.Hash())
+	if err != nil {
+		return nil, fmt.Errorf("failed to get commit for tag %s: %w", sinceTag, err)
+	}
+
+	// Get HEAD reference
+	ref, err := w.repo.Head()
+	if err != nil {
+		return nil, fmt.Errorf("failed to get HEAD: %w", err)
+	}
+
+	// Walk from HEAD down to the tag commit (excluding it)
+	commitIter, err := w.repo.Log(&git.LogOptions{
+		From:  ref.Hash(),
+		Order: git.LogOrderCommitterTime,
+	})
+	if err != nil {
+		return nil, fmt.Errorf("failed to create commit iterator: %w", err)
+	}
+	defer commitIter.Close()
+
+	versions := make(map[string]*Version)
+	currentVersion := "Unreleased"
+	prNumbers := make(map[string][]int)
+
+	err = commitIter.ForEach(func(c *object.Commit) error {
+		// Stop iteration when the hash of the current commit matches the hash of the specified sinceTag commit
+		if c.Hash == tagCommit.Hash {
+			return storer.ErrStop
+		}
+
+		commit := &Commit{
+			SHA:     c.Hash.String(),
+			Message: strings.TrimSpace(c.Message),
+			Author:  c.Author.Name,
+			Email:   c.Author.Email,
+			Date:    c.Author.When,
+			IsMerge: len(c.ParentHashes) > 1,
+		}
+
+		// Check for version pattern
+		if matches := versionPattern.FindStringSubmatch(commit.Message); len(matches) > 1 {
+			commit.IsVersion = true
+			commit.Version = matches[1]
+			currentVersion = commit.Version
+
+			if _, exists := versions[currentVersion]; !exists {
+				versions[currentVersion] = &Version{
+					Name:      currentVersion,
+					Date:      commit.Date,
+					CommitSHA: commit.SHA,
+					Commits:   []*Commit{},
+				}
+			}
+			return nil
+		}
+
+		// Check for PR merge pattern
+		if matches := prPattern.FindStringSubmatch(commit.Message); len(matches) > 1 {
+			prNumber, err := strconv.Atoi(matches[1])
+			if err != nil {
+				// Handle parsing error (e.g., log it or skip processing)
+				return fmt.Errorf("failed to parse PR number: %v", err)
+			}
+			commit.PRNumber = prNumber
+
+			prNumbers[currentVersion] = append(prNumbers[currentVersion], prNumber)
+		}
+
+		// Add commit to current version
+		if _, exists := versions[currentVersion]; !exists {
+			versions[currentVersion] = &Version{
+				Name:      currentVersion,
+				Date:      time.Time{}, // Zero value, will be set by version commit
+				CommitSHA: "",
+				Commits:   []*Commit{},
+			}
+		}
+
+		versions[currentVersion].Commits = append(versions[currentVersion].Commits, commit)
+		return nil
+	})
+
+	// Handle the stop condition - storer.ErrStop is expected
+	if err == storer.ErrStop {
+		err = nil
+	}
+
+	// Assign collected PR numbers to each version
+	for version, prs := range prNumbers {
+		versions[version].PRNumbers = dedupInts(prs)
+	}
+
+	return versions, err
+}
+
+func dedupInts(ints []int) []int {
+	seen := make(map[int]bool)
+	result := []int{}
+
+	for _, i := range ints {
+		if !seen[i] {
+			seen[i] = true
+			result = append(result, i)
+		}
+	}
+
+	return result
+}

cmd/generate_changelog/internal/github/client.go

@@ -0,0 +1,354 @@
+package github
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"os"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/google/go-github/v66/github"
+	"github.com/hasura/go-graphql-client"
+	"golang.org/x/oauth2"
+)
+
+type Client struct {
+	client        *github.Client
+	graphqlClient *graphql.Client
+	owner         string
+	repo          string
+	token         string
+}
+
+func NewClient(token, owner, repo string) *Client {
+	var githubClient *github.Client
+	var httpClient *http.Client
+	var gqlClient *graphql.Client
+
+	if token != "" {
+		ts := oauth2.StaticTokenSource(
+			&oauth2.Token{AccessToken: token},
+		)
+		httpClient = oauth2.NewClient(context.Background(), ts)
+		githubClient = github.NewClient(httpClient)
+		gqlClient = graphql.NewClient("https://api.github.com/graphql", httpClient)
+	} else {
+		httpClient = http.DefaultClient
+		githubClient = github.NewClient(nil)
+		gqlClient = graphql.NewClient("https://api.github.com/graphql", httpClient)
+	}
+
+	return &Client{
+		client:        githubClient,
+		graphqlClient: gqlClient,
+		owner:         owner,
+		repo:          repo,
+		token:         token,
+	}
+}
+
+func (c *Client) FetchPRs(prNumbers []int) ([]*PR, error) {
+	if len(prNumbers) == 0 {
+		return []*PR{}, nil
+	}
+
+	ctx := context.Background()
+	prs := make([]*PR, 0, len(prNumbers))
+	prsChan := make(chan *PR, len(prNumbers))
+	errChan := make(chan error, len(prNumbers))
+
+	var wg sync.WaitGroup
+	semaphore := make(chan struct{}, 10)
+
+	for _, prNumber := range prNumbers {
+		wg.Add(1)
+		go func(num int) {
+			defer wg.Done()
+
+			semaphore <- struct{}{}
+			defer func() { <-semaphore }()
+
+			pr, err := c.fetchSinglePR(ctx, num)
+			if err != nil {
+				errChan <- fmt.Errorf("failed to fetch PR #%d: %w", num, err)
+				return
+			}
+			prsChan <- pr
+		}(prNumber)
+	}
+
+	go func() {
+		wg.Wait()
+		close(prsChan)
+		close(errChan)
+	}()
+
+	var errors []error
+	for pr := range prsChan {
+		prs = append(prs, pr)
+	}
+	for err := range errChan {
+		errors = append(errors, err)
+	}
+
+	if len(errors) > 0 {
+		return prs, fmt.Errorf("some PRs failed to fetch: %v", errors)
+	}
+
+	return prs, nil
+}
+
+func (c *Client) fetchSinglePR(ctx context.Context, prNumber int) (*PR, error) {
+	pr, _, err := c.client.PullRequests.Get(ctx, c.owner, c.repo, prNumber)
+	if err != nil {
+		return nil, err
+	}
+
+	commits, _, err := c.client.PullRequests.ListCommits(ctx, c.owner, c.repo, prNumber, nil)
+	if err != nil {
+		return nil, fmt.Errorf("failed to fetch commits: %w", err)
+	}
+
+	result := &PR{
+		Number:  prNumber,
+		Title:   getString(pr.Title),
+		Body:    getString(pr.Body),
+		URL:     getString(pr.HTMLURL),
+		Commits: make([]PRCommit, 0, len(commits)),
+	}
+
+	if pr.MergedAt != nil {
+		result.MergedAt = pr.MergedAt.Time
+	}
+
+	if pr.User != nil {
+		result.Author = getString(pr.User.Login)
+		result.AuthorURL = getString(pr.User.HTMLURL)
+		userType := getString(pr.User.Type) // GitHub API returns "User", "Organization", or "Bot"
+
+		// Convert GitHub API type to lowercase
+		switch userType {
+		case "User":
+			result.AuthorType = "user"
+		case "Organization":
+			result.AuthorType = "organization"
+		case "Bot":
+			result.AuthorType = "bot"
+		default:
+			result.AuthorType = "user" // Default fallback
+		}
+	}
+
+	if pr.MergeCommitSHA != nil {
+		result.MergeCommit = *pr.MergeCommitSHA
+	}
+
+	for _, commit := range commits {
+		if commit.Commit != nil {
+			prCommit := PRCommit{
+				SHA:     getString(commit.SHA),
+				Message: strings.TrimSpace(getString(commit.Commit.Message)),
+			}
+			if commit.Commit.Author != nil {
+				prCommit.Author = getString(commit.Commit.Author.Name)
+			}
+			result.Commits = append(result.Commits, prCommit)
+		}
+	}
+
+	return result, nil
+}
+
+func getString(s *string) string {
+	if s == nil {
+		return ""
+	}
+	return *s
+}
+
+// FetchAllMergedPRs fetches all merged PRs using GitHub's search API
+// This is much more efficient than fetching PRs individually
+func (c *Client) FetchAllMergedPRs(since time.Time) ([]*PR, error) {
+	ctx := context.Background()
+	var allPRs []*PR
+
+	// Build search query for merged PRs
+	query := fmt.Sprintf("repo:%s/%s is:pr is:merged", c.owner, c.repo)
+	if !since.IsZero() {
+		query += fmt.Sprintf(" merged:>=%s", since.Format("2006-01-02"))
+	}
+
+	opts := &github.SearchOptions{
+		Sort:  "created",
+		Order: "desc",
+		ListOptions: github.ListOptions{
+			PerPage: 100, // Maximum allowed
+		},
+	}
+
+	for {
+		result, resp, err := c.client.Search.Issues(ctx, query, opts)
+		if err != nil {
+			return allPRs, fmt.Errorf("failed to search PRs: %w", err)
+		}
+
+		// Process PRs in parallel
+		prsChan := make(chan *PR, len(result.Issues))
+		errChan := make(chan error, len(result.Issues))
+		var wg sync.WaitGroup
+		semaphore := make(chan struct{}, 10) // Limit concurrent requests
+
+		for _, issue := range result.Issues {
+			if issue.PullRequestLinks == nil {
+				continue // Not a PR
+			}
+
+			wg.Add(1)
+			go func(prNumber int) {
+				defer wg.Done()
+
+				semaphore <- struct{}{}
+				defer func() { <-semaphore }()
+
+				pr, err := c.fetchSinglePR(ctx, prNumber)
+				if err != nil {
+					errChan <- fmt.Errorf("failed to fetch PR #%d: %w", prNumber, err)
+					return
+				}
+				prsChan <- pr
+			}(*issue.Number)
+		}
+
+		go func() {
+			wg.Wait()
+			close(prsChan)
+			close(errChan)
+		}()
+
+		// Collect results
+		for pr := range prsChan {
+			allPRs = append(allPRs, pr)
+		}
+
+		// Check for errors
+		for err := range errChan {
+			// Log error but continue processing
+			fmt.Fprintf(os.Stderr, "Warning: %v\n", err)
+		}
+
+		if resp.NextPage == 0 {
+			break
+		}
+		opts.Page = resp.NextPage
+	}
+
+	return allPRs, nil
+}
+
+// FetchAllMergedPRsGraphQL fetches all merged PRs with their commits using GraphQL
+// This is the ultimate optimization - gets everything in ~5-10 API calls
+func (c *Client) FetchAllMergedPRsGraphQL(since time.Time) ([]*PR, error) {
+	ctx := context.Background()
+	var allPRs []*PR
+	var after *string
+	totalFetched := 0
+
+	for {
+		// Prepare variables
+		variables := map[string]interface{}{
+			"owner": graphql.String(c.owner),
+			"repo":  graphql.String(c.repo),
+			"after": (*graphql.String)(after),
+		}
+
+		// Execute GraphQL query
+		var query PullRequestsQuery
+		err := c.graphqlClient.Query(ctx, &query, variables)
+		if err != nil {
+			return allPRs, fmt.Errorf("GraphQL query failed: %w", err)
+		}
+
+		prs := query.Repository.PullRequests.Nodes
+		fmt.Fprintf(os.Stderr, "Fetched %d PRs via GraphQL (page %d)\n", len(prs), (totalFetched/100)+1)
+
+		// Convert GraphQL PRs to our PR struct
+		for _, gqlPR := range prs {
+			// If we have a since filter, stop when we reach older PRs
+			if !since.IsZero() && gqlPR.MergedAt.Before(since) {
+				fmt.Fprintf(os.Stderr, "Reached PRs older than %s, stopping\n", since.Format("2006-01-02"))
+				return allPRs, nil
+			}
+
+			pr := &PR{
+				Number:   gqlPR.Number,
+				Title:    gqlPR.Title,
+				Body:     gqlPR.Body,
+				URL:      gqlPR.URL,
+				MergedAt: gqlPR.MergedAt,
+				Commits:  make([]PRCommit, 0, len(gqlPR.Commits.Nodes)),
+			}
+
+			// Handle author - check if it's nil first
+			if gqlPR.Author != nil {
+				pr.Author = gqlPR.Author.Login
+				pr.AuthorURL = gqlPR.Author.URL
+
+				switch gqlPR.Author.Typename {
+				case "Bot":
+					pr.AuthorType = "bot"
+				case "Organization":
+					pr.AuthorType = "organization"
+				case "User":
+					pr.AuthorType = "user"
+				default:
+					pr.AuthorType = "user" // fallback
+					if gqlPR.Author.Typename != "" {
+						fmt.Fprintf(os.Stderr, "PR #%d: Unknown author typename '%s'\n", gqlPR.Number, gqlPR.Author.Typename)
+					}
+				}
+			} else {
+				// Author is nil - try to fetch from REST API as fallback
+				fmt.Fprintf(os.Stderr, "PR #%d: Author is nil in GraphQL response, fetching from REST API\n", gqlPR.Number)
+
+				// Fetch this specific PR from REST API
+				restPR, err := c.fetchSinglePR(ctx, gqlPR.Number)
+				if err == nil && restPR != nil && restPR.Author != "" {
+					pr.Author = restPR.Author
+					pr.AuthorURL = restPR.AuthorURL
+					pr.AuthorType = restPR.AuthorType
+				} else {
+					// Fallback if REST API also fails
+					pr.Author = "[unknown]"
+					pr.AuthorURL = ""
+					pr.AuthorType = "user"
+				}
+			}
+
+			// Convert commits
+			for _, commitNode := range gqlPR.Commits.Nodes {
+				commit := PRCommit{
+					SHA:     commitNode.Commit.OID,
+					Message: strings.TrimSpace(commitNode.Commit.Message),
+					Author:  commitNode.Commit.Author.Name,
+				}
+				pr.Commits = append(pr.Commits, commit)
+			}
+
+			allPRs = append(allPRs, pr)
+		}
+
+		totalFetched += len(prs)
+
+		// Check if we need to fetch more pages
+		if !query.Repository.PullRequests.PageInfo.HasNextPage {
+			break
+		}
+
+		after = &query.Repository.PullRequests.PageInfo.EndCursor
+	}
+
+	fmt.Fprintf(os.Stderr, "Total PRs fetched via GraphQL: %d\n", len(allPRs))
+	return allPRs, nil
+}

cmd/generate_changelog/internal/github/types.go

@@ -0,0 +1,57 @@
+package github
+
+import "time"
+
+type PR struct {
+	Number      int
+	Title       string
+	Body        string
+	Author      string
+	AuthorURL   string
+	AuthorType  string // "user", "organization", or "bot"
+	URL         string
+	MergedAt    time.Time
+	Commits     []PRCommit
+	MergeCommit string
+}
+
+type PRCommit struct {
+	SHA     string
+	Message string
+	Author  string
+}
+
+// GraphQL query structures for hasura client
+type PullRequestsQuery struct {
+	Repository struct {
+		PullRequests struct {
+			PageInfo struct {
+				HasNextPage bool
+				EndCursor   string
+			}
+			Nodes []struct {
+				Number   int
+				Title    string
+				Body     string
+				URL      string
+				MergedAt time.Time
+				Author   *struct {
+					Typename string `graphql:"__typename"`
+					Login    string `graphql:"login"`
+					URL      string `graphql:"url"`
+				}
+				Commits struct {
+					Nodes []struct {
+						Commit struct {
+							OID     string `graphql:"oid"`
+							Message string
+							Author  struct {
+								Name string
+							}
+						}
+					}
+				} `graphql:"commits(first: 250)"`
+			}
+		} `graphql:"pullRequests(first: 100, after: $after, states: MERGED, orderBy: {field: UPDATED_AT, direction: DESC})"`
+	} `graphql:"repository(owner: $owner, name: $repo)"`
+}

cmd/generate_changelog/main.go

@@ -0,0 +1,84 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/danielmiessler/fabric/cmd/generate_changelog/internal/changelog"
+	"github.com/danielmiessler/fabric/cmd/generate_changelog/internal/config"
+	"github.com/joho/godotenv"
+	"github.com/spf13/cobra"
+)
+
+var (
+	cfg = &config.Config{}
+)
+
+var rootCmd = &cobra.Command{
+	Use:   "generate_changelog",
+	Short: "Generate changelog from git history and GitHub PRs",
+	Long: `A high-performance changelog generator that walks git history,
+collects version information and pull requests, and generates a
+comprehensive changelog in markdown format.`,
+	RunE: run,
+}
+
+func init() {
+	rootCmd.Flags().StringVarP(&cfg.RepoPath, "repo", "r", ".", "Repository path")
+	rootCmd.Flags().StringVarP(&cfg.OutputFile, "output", "o", "", "Output file (default: stdout)")
+	rootCmd.Flags().IntVarP(&cfg.Limit, "limit", "l", 0, "Limit number of versions (0 = all)")
+	rootCmd.Flags().StringVarP(&cfg.Version, "version", "v", "", "Generate changelog for specific version")
+	rootCmd.Flags().BoolVar(&cfg.SaveData, "save-data", false, "Save version data to JSON for debugging")
+	rootCmd.Flags().StringVar(&cfg.CacheFile, "cache", "./cmd/generate_changelog/changelog.db", "Cache database file")
+	rootCmd.Flags().BoolVar(&cfg.NoCache, "no-cache", false, "Disable cache usage")
+	rootCmd.Flags().BoolVar(&cfg.RebuildCache, "rebuild-cache", false, "Rebuild cache from scratch")
+	rootCmd.Flags().StringVar(&cfg.GitHubToken, "token", "", "GitHub API token (or set GITHUB_TOKEN env var)")
+	rootCmd.Flags().BoolVar(&cfg.ForcePRSync, "force-pr-sync", false, "Force a full PR sync from GitHub (ignores cache age)")
+	rootCmd.Flags().BoolVar(&cfg.EnableAISummary, "ai-summarize", false, "Generate AI-enhanced summaries using Fabric")
+}
+
+func run(cmd *cobra.Command, args []string) error {
+	if cfg.GitHubToken == "" {
+		cfg.GitHubToken = os.Getenv("GITHUB_TOKEN")
+	}
+
+	generator, err := changelog.New(cfg)
+	if err != nil {
+		return fmt.Errorf("failed to create changelog generator: %w", err)
+	}
+
+	output, err := generator.Generate()
+	if err != nil {
+		return fmt.Errorf("failed to generate changelog: %w", err)
+	}
+
+	if cfg.OutputFile != "" {
+		if err := os.WriteFile(cfg.OutputFile, []byte(output), 0644); err != nil {
+			return fmt.Errorf("failed to write output file: %w", err)
+		}
+		fmt.Printf("Changelog written to %s\n", cfg.OutputFile)
+	} else {
+		fmt.Print(output)
+	}
+
+	return nil
+}
+
+func main() {
+	// Load .env file from the same directory as the binary
+	if exePath, err := os.Executable(); err == nil {
+		envPath := filepath.Join(filepath.Dir(exePath), ".env")
+		if _, err := os.Stat(envPath); err == nil {
+			// .env file exists, load it
+			if err := godotenv.Load(envPath); err != nil {
+				fmt.Fprintf(os.Stderr, "Warning: Failed to load .env file: %v\n", err)
+			}
+		}
+	}
+
+	if err := rootCmd.Execute(); err != nil {
+		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
+		os.Exit(1)
+	}
+}

common/domain_test.go

@@ -1,27 +0,0 @@
-package common
-
-import (
-	"testing"
-
-	goopenai "github.com/sashabaranov/go-openai"
-	"github.com/stretchr/testify/assert"
-)
-
-func TestNormalizeMessages(t *testing.T) {
-	msgs := []*goopenai.ChatCompletionMessage{
-		{Role: goopenai.ChatMessageRoleUser, Content: "Hello"},
-		{Role: goopenai.ChatMessageRoleAssistant, Content: "Hi there!"},
-		{Role: goopenai.ChatMessageRoleUser, Content: ""},
-		{Role: goopenai.ChatMessageRoleUser, Content: ""},
-		{Role: goopenai.ChatMessageRoleUser, Content: "How are you?"},
-	}
-
-	expected := []*goopenai.ChatCompletionMessage{
-		{Role: goopenai.ChatMessageRoleUser, Content: "Hello"},
-		{Role: goopenai.ChatMessageRoleAssistant, Content: "Hi there!"},
-		{Role: goopenai.ChatMessageRoleUser, Content: "How are you?"},
-	}
-
-	actual := NormalizeMessages(msgs, "default")
-	assert.Equal(t, expected, actual)
-}

completions/_fabric

@@ -96,6 +96,13 @@ _fabric() {
     '(--api-key)--api-key[API key used to secure server routes]:api-key:' \
     '(--config)--config[Path to YAML config file]:config file:_files -g "*.yaml *.yml"' \
     '(--version)--version[Print current version]' \
+    '(--search)--search[Enable web search tool for supported models (Anthropic, OpenAI)]' \
+    '(--search-location)--search-location[Set location for web search results]:location:' \
+    '(--image-file)--image-file[Save generated image to specified file path]:image file:_files -g "*.png *.webp *.jpeg *.jpg"' \
+    '(--image-size)--image-size[Image dimensions]:size:(1024x1024 1536x1024 1024x1536 auto)' \
+    '(--image-quality)--image-quality[Image quality]:quality:(low medium high auto)' \
+    '(--image-compression)--image-compression[Compression level 0-100 for JPEG/WebP formats]:compression:' \
+    '(--image-background)--image-background[Background type]:background:(opaque transparent)' \
     '(--listextensions)--listextensions[List all registered extensions]' \
     '(--addextension)--addextension[Register a new extension from config file path]:config file:_files -g "*.yaml *.yml"' \
     '(--rmextension)--rmextension[Remove a registered extension by name]:extension:_fabric_extensions' \

completions/fabric.bash

@@ -13,7 +13,7 @@ _fabric() {
   _get_comp_words_by_ref -n : cur prev words cword
 
   # Define all possible options/flags
-  local opts="--pattern -p --variable -v --context -C --session --attachment -a --setup -S --temperature -t --topp -T --stream -s --presencepenalty -P --raw -r --frequencypenalty -F --listpatterns -l --listmodels -L --listcontexts -x --listsessions -X --updatepatterns -U --copy -c --model -m --modelContextLength --output -o --output-session --latest -n --changeDefaultModel -d --youtube -y --playlist --transcript --transcript-with-timestamps --comments --metadata --language -g --scrape_url -u --scrape_question -q --seed -e --wipecontext -w --wipesession -W --printcontext --printsession --readability --input-has-vars --dry-run --serve --serveOllama --address --api-key --config --version --listextensions --addextension --rmextension --strategy --liststrategies --listvendors --shell-complete-list --help -h"
+  local opts="--pattern -p --variable -v --context -C --session --attachment -a --setup -S --temperature -t --topp -T --stream -s --presencepenalty -P --raw -r --frequencypenalty -F --listpatterns -l --listmodels -L --listcontexts -x --listsessions -X --updatepatterns -U --copy -c --model -m --modelContextLength --output -o --output-session --latest -n --changeDefaultModel -d --youtube -y --playlist --transcript --transcript-with-timestamps --comments --metadata --language -g --scrape_url -u --scrape_question -q --seed -e --wipecontext -w --wipesession -W --printcontext --printsession --readability --input-has-vars --dry-run --serve --serveOllama --address --api-key --config --search --search-location --image-file --image-size --image-quality --image-compression --image-background --version --listextensions --addextension --rmextension --strategy --liststrategies --listvendors --shell-complete-list --help -h"
 
   # Helper function for dynamic completions
   _fabric_get_list() {
@@ -63,12 +63,25 @@ _fabric() {
     return 0
     ;;
   # Options requiring file/directory paths
-  -a | --attachment | -o | --output | --config | --addextension)
+  -a | --attachment | -o | --output | --config | --addextension | --image-file)
     _filedir
     return 0
     ;;
+  # Image generation options with specific values
+  --image-size)
+    COMPREPLY=($(compgen -W "1024x1024 1536x1024 1024x1536 auto" -- "$cur"))
+    return 0
+    ;;
+  --image-quality)
+    COMPREPLY=($(compgen -W "low medium high auto" -- "$cur"))
+    return 0
+    ;;
+  --image-background)
+    COMPREPLY=($(compgen -W "opaque transparent" -- "$cur"))
+    return 0
+    ;;
   # Options requiring simple arguments (no specific completion logic here)
-  -v | --variable | -t | --temperature | -T | --topp | -P | --presencepenalty | -F | --frequencypenalty | --modelContextLength | -n | --latest | -y | --youtube | -g | --language | -u | --scrape_url | -q | --scrape_question | -e | --seed | --address | --api-key)
+  -v | --variable | -t | --temperature | -T | --topp | -P | --presencepenalty | -F | --frequencypenalty | --modelContextLength | -n | --latest | -y | --youtube | -g | --language | -u | --scrape_url | -q | --scrape_question | -e | --seed | --address | --api-key | --search-location | --image-compression)
     # No specific completion suggestions, user types the value
     return 0
     ;;

completions/fabric.fish

@@ -60,6 +60,12 @@ complete -c fabric -l printsession -d "Print session" -a "(__fabric_get_sessions
 complete -c fabric -l address -d "The address to bind the REST API (default: :8080)"
 complete -c fabric -l api-key -d "API key used to secure server routes"
 complete -c fabric -l config -d "Path to YAML config file" -r -a "*.yaml *.yml"
+complete -c fabric -l search-location -d "Set location for web search results (e.g., 'America/Los_Angeles')"
+complete -c fabric -l image-file -d "Save generated image to specified file path (e.g., 'output.png')" -r -a "*.png *.webp *.jpeg *.jpg"
+complete -c fabric -l image-size -d "Image dimensions: 1024x1024, 1536x1024, 1024x1536, auto (default: auto)" -a "1024x1024 1536x1024 1024x1536 auto"
+complete -c fabric -l image-quality -d "Image quality: low, medium, high, auto (default: auto)" -a "low medium high auto"
+complete -c fabric -l image-compression -d "Compression level 0-100 for JPEG/WebP formats (default: not set)" -r
+complete -c fabric -l image-background -d "Background type: opaque, transparent (default: opaque, only for PNG/WebP)" -a "opaque transparent"
 complete -c fabric -l addextension -d "Register a new extension from config file path" -r -a "*.yaml *.yml"
 complete -c fabric -l rmextension -d "Remove a registered extension by name" -a "(__fabric_get_extensions)"
 complete -c fabric -l strategy -d "Choose a strategy from the available strategies" -a "(__fabric_get_strategies)"
@@ -84,6 +90,7 @@ complete -c fabric -l metadata -d "Output video metadata"
 complete -c fabric -l readability -d "Convert HTML input into a clean, readable view"
 complete -c fabric -l input-has-vars -d "Apply variables to user input"
 complete -c fabric -l dry-run -d "Show what would be sent to the model without actually sending it"
+complete -c fabric -l search -d "Enable web search tool for supported models (Anthropic, OpenAI)"
 complete -c fabric -l serve -d "Serve the Fabric Rest API"
 complete -c fabric -l serveOllama -d "Serve the Fabric Rest API with ollama endpoints"
 complete -c fabric -l version -d "Print current version"

data/patterns/analyze_debate/system.md

@@ -22,19 +22,20 @@ Take a deep breath and think step by step about how to best accomplish this goal
     This must be under the heading "INSIGHTFULNESS SCORE (0 = not very interesting and insightful to 10 = very interesting and insightful)".
     - A rating of how emotional the debate was from 0 (very calm) to 5 (very emotional). This must be under the heading "EMOTIONALITY SCORE (0 (very calm) to 5 (very emotional))".
     - A list of the participants of the debate and a score of their emotionality from 0 (very calm) to 5 (very emotional). This must be under the heading "PARTICIPANTS".
-    - A list of arguments attributed to participants with names and quotes. If possible, this should include external references that disprove or back up their claims. 
+    - A list of arguments attributed to participants with names and quotes. Each argument summary must be EXACTLY 16 words. If possible, this should include external references that disprove or back up their claims. 
     It is IMPORTANT that these references are from trusted and verifiable sources that can be easily accessed. These sources have to BE REAL and NOT MADE UP. This must be under the heading "ARGUMENTS". 
     If possible, provide an objective assessment of the truth of these arguments. If you assess the truth of the argument, provide some sources that back up your assessment. The material you provide should be from reliable, verifiable, and trustworthy sources. DO NOT MAKE UP SOURCES.
-    - A list of agreements the participants have reached, attributed with names and quotes. This must be under the heading "AGREEMENTS".
-    - A list of disagreements the participants were unable to resolve and the reasons why they remained unresolved, attributed with names and quotes. This must be under the heading "DISAGREEMENTS".
-    - A list of possible misunderstandings and why they may have occurred, attributed with names and quotes. This must be under the heading "POSSIBLE MISUNDERSTANDINGS".
-    - A list of learnings from the debate. This must be under the heading "LEARNINGS".
-    - A list of takeaways that highlight ideas to think about, sources to explore, and actionable items. This must be under the heading "TAKEAWAYS".
+    - A list of agreements the participants have reached. Each agreement summary must be EXACTLY 16 words, followed by names and quotes. This must be under the heading "AGREEMENTS".
+    - A list of disagreements the participants were unable to resolve. Each disagreement summary must be EXACTLY 16 words, followed by names and quotes explaining why they remained unresolved. This must be under the heading "DISAGREEMENTS".
+    - A list of possible misunderstandings. Each misunderstanding summary must be EXACTLY 16 words, followed by names and quotes explaining why they may have occurred. This must be under the heading "POSSIBLE MISUNDERSTANDINGS".
+    - A list of learnings from the debate. Each learning must be EXACTLY 16 words. This must be under the heading "LEARNINGS".
+    - A list of takeaways that highlight ideas to think about, sources to explore, and actionable items. Each takeaway must be EXACTLY 16 words. This must be under the heading "TAKEAWAYS".
 
 # OUTPUT INSTRUCTIONS
 
 - Output all sections above.
-- Use Markdown to structure your output.
+- Do not use any markdown formatting (no asterisks, no bullet points, no headers).
+- Keep all agreements, arguments, recommendations, learnings, and takeaways to EXACTLY 16 words each.
 - When providing quotes, these quotes should clearly express the points you are using them for. If necessary, use multiple quotes.
 
 # INPUT:

data/patterns/analyze_paper/system.md

@@ -8,19 +8,19 @@ Take a deep breath and think step by step about how to best accomplish this goal
 
 - Consume the entire paper and think deeply about it.
 
-- Map out all the claims and implications on a virtual whiteboard in your mind.
+- Map out all the claims and implications on a giant virtual whiteboard in your mind.
 
 # OUTPUT 
 
-- Extract a summary of the paper and its conclusions into a 25-word sentence called SUMMARY.
+- Extract a summary of the paper and its conclusions into a 16-word sentence called SUMMARY.
 
 - Extract the list of authors in a section called AUTHORS.
 
 - Extract the list of organizations the authors are associated, e.g., which university they're at, with in a section called AUTHOR ORGANIZATIONS.
 
-- Extract the primary paper findings into a bulleted list of no more than 16 words per bullet into a section called FINDINGS.
+- Extract the most surprising and interesting paper findings into a 10 bullets of no more than 16 words per bullet into a section called FINDINGS.
 
-- Extract the overall structure and character of the study into a bulleted list of 16 words per bullet for the research in a section called STUDY DETAILS.
+- Extract the overall structure and character of the study into a bulleted list of 16 words per bullet for the research in a section called STUDY OVERVIEW.
 
 - Extract the study quality by evaluating the following items in a section called STUDY QUALITY that has the following bulleted sub-sections:
 
@@ -76,7 +76,9 @@ END EXAMPLE CHART
 
 - SUMMARY STATEMENT:
 
-A final 25-word summary of the paper, its findings, and what we should do about it if it's true.
+A final 16-word summary of the paper, its findings, and what we should do about it if it's true.
+
+Also add 5 8-word bullets of how you got to that rating and conclusion / summary.
 
 # RATING NOTES
 
@@ -84,21 +86,23 @@ A final 25-word summary of the paper, its findings, and what we should do about
 
 - An A would be a paper that is novel, rigorous, empirical, and has no conflicts of interest.
 
-- A paper could get an A if it's theoretical but everything else would have to be perfect.
+- A paper could get an A if it's theoretical but everything else would have to be VERY good.
 
 - The stronger the claims the stronger the evidence needs to be, as well as the transparency into the methodology. If the paper makes strong claims, but the evidence or transparency is weak, then the RIGOR score should be lowered.
 
 - Remove at least 1 grade (and up to 2) for papers where compelling data is provided but it's not clear what exact tests were run and/or how to reproduce those tests. 
 
-- Do not relax this transparency requirement for papers that claim security reasons.
-
-- If a paper does not clearly articulate its methodology in a way that's replicable, lower the RIGOR and overall score significantly.
+- Do not relax this transparency requirement for papers that claim security reasons. If they didn't show their work we have to assume the worst given the reproducibility crisis..
 
 - Remove up to 1-3 grades for potential conflicts of interest indicated in the report.
 
+# ANALYSIS INSTRUCTIONS
+
+- Tend towards being more critical. Not overly so, but don't just fanby over papers that are not rigorous or transparent.
+ 
 # OUTPUT INSTRUCTIONS
 
-- Output all sections above.
+- After deeply considering all the sections above and how they interact with each other, output all sections above.
 
 - Ensure the scoring looks closely at the reproducibility and transparency of the methodology, and that it doesn't give a pass to papers that don't provide the data or methodology for safety or other reasons.
 
@@ -108,7 +112,7 @@ Known         [-2--------]    Novel
 Weak          [-------8--]    Rigorous
 Theoretical   [--3-------]     Empirical
 
-- For the findings and other analysis sections, write at the 9th-grade reading level. This means using short sentences and simple words/concepts to explain everything.
+- For the findings and other analysis sections, and in fact all writing, write in the clear, approachable style of Paul Graham.
 
 - Ensure there's a blank line between each bullet of output.
 
@@ -120,4 +124,3 @@ Theoretical   [--3-------]     Empirical
 
 # INPUT:
 
-INPUT:

data/patterns/apply_ul_tags/system.md

@@ -0,0 +1,49 @@
+# IDENTITY
+
+You are a superintelligent expert on content of all forms, with deep understanding of which topics, categories, themes, and tags apply to any piece of content.
+
+# GOAL
+
+Your goal is to output a JSON object called tags, with the following tags applied if the content is significantly about their topic.
+
+- **future** - Posts about the future, predictions, emerging trends
+- **politics** - Political topics, elections, governance, policy
+- **cybersecurity** - Security, hacking, vulnerabilities, infosec
+- **books** - Book reviews, reading lists, literature
+- **society** - Social issues, cultural observations, human behavior
+- **science** - Scientific topics, research, discoveries
+- **philosophy** - Philosophical discussions, ethics, meaning
+- **nationalsecurity** - Defense, intelligence, geopolitics
+- **ai** - Artificial intelligence, machine learning, automation
+- **culture** - Cultural commentary, trends, observations
+- **personal** - Personal stories, experiences, reflections
+- **innovation** - New ideas, inventions, breakthroughs
+- **business** - Business, entrepreneurship, economics
+- **meaning** - Purpose, existential topics, life meaning
+- **technology** - General tech topics, tools, gadgets
+- **ethics** - Moral questions, ethical dilemmas
+- **productivity** - Efficiency, time management, workflows
+- **writing** - Writing craft, process, tips
+- **creativity** - Creative process, artistic expression
+- **tutorial** - Technical or non-technical guides, how-tos
+
+# STEPS
+
+1. Deeply understand the content and its themes and categories and topics.
+2. Evaluate the list of tags above.
+3. Determine which tags apply to the content.
+4. Output the "tags" JSON object.
+
+# NOTES
+
+- It's ok, and quite normal, for multiple tags to apply—which is why this is tags and not categories
+- All AI posts should have the technology tag, and that's ok. But not all technology posts are about AI, and therefore the AI tag needs to be evaluated separately. That goes for all potentially nested or conflicted tags.
+- Be a bit conservative in applying tags. If a piece of content is only tangentially related to a tag, don't include it.
+
+# OUTPUT INSTRUCTIONS
+
+- Output ONLY the JSON object, and nothing else. 
+
+- That means DO NOT OUTPUT the ```json format indicator. ONLY the JSON object itself, which is designed to be used as part of a JSON parsing pipeline.
+
+