Add table detailing AI rule file character limits for various tools#179817
Merged
Conversation
Member
Author
|
Contributor
There was a problem hiding this comment.
Code Review
This pull request adds a helpful markdown table to docs/rules/README.md detailing the character limits for AI rule files across various tools. The table is well-structured and informative. My main suggestion is to enhance the 'Notes �&� Sources' column by adding hyperlinks to the source documentation, which would make the information more easily verifiable for readers.
Comment on lines
+10
to
+21
| | Tool / Product | Rules File / Feature | **Soft / Hard Limit** | Notes & Sources | | ||
| | :--- | :--- | :--- | :--- | | ||
| | **Aider** | `.aider.conf.yml` / `CONVENTIONS.md` | **No Hard Limit** | Uses `CONVENTIONS.md` for rules. Limited by model context window.<br>**Source:** Aider Docs: Configuration | | ||
| | **Antigravity** (Google) | `.agent/rules/*.md` | **12,000 characters** (Hard) | **Source:** User Screenshot (Client-side validation error).<br>No public documentation found specifying this exact client limit yet. | | ||
| | **CodeRabbit** | `.coderabbit.yaml` Instructions | **10,000 characters** (Hard) | "Instructions: max 10000 characters."<br>**Source:** CodeRabbit Docs: Configuration | | ||
| | **Cursor** | `.cursorrules` | **No Hard Limit** | "There is no limit to the .cursorrules file... generally recommend keeping valid rules."<br>**Source:** Cursor Community Forum | | ||
| | **Gemini CLI** | Input Context | **1M+ Tokens** (Context) | Limited by model context (approx 700k words). Practical per-file limits (e.g. 20MB) may apply.<br>**Source:** Google Cloud: Gemini Models | | ||
| | **GitHub Copilot** | **Chat** Instructions | **~2 Pages** (Soft) | "We recommend... no longer than 2 pages."<br>**Source:** GitHub Docs: Custom Instructions | | ||
| | **GitHub Copilot** | **Code Review** Instructions | **4,000 characters** (Hard) | "Instructions... limited to 4000 characters."<br>**Source:** GitHub Docs: Custom Instructions | | ||
| | **Goose** | `.goosehints` / `AGENTS.md` | **No Hard Limit** | Limited by model context. Auto-compacts conversation when full.<br>**Source:** Block Goose: Context Management | | ||
| | **JetBrains AI** | `.aiassistant/rules` | **No Hard Limit** | Limited only by the model's context window (prompts are trimmed if too large).<br>**Source:** JetBrains Blog: AI Assistant Update | | ||
| | **OpenAI** (ChatGPT) | Custom Instructions | **1,500 characters** (Hard) | "Instructions... 1500 character limit."<br>**Source:** OpenAI Help: Custom Instructions | |
Contributor
There was a problem hiding this comment.
This is a very useful table. To make it even more helpful, consider adding hyperlinks to the sources in the 'Notes �&� Sources' column. This would allow readers to easily verify the information and get more context if needed.
For example, for Aider, you could change:
**Source:** Aider Docs: Configuration
to something like:
**Source:** [Aider Docs: Configuration](https://aider.chat/docs/configuration.html)
Applying this to all sources where a public URL is available would be a great improvement.
Contributor
There was a problem hiding this comment.
agreed - not only would it help to know where these numbers come from but also it would give us a place to go when we inevitably need to update this
1a133cb to
56f41f5
Compare
jakemac53
reviewed
Dec 19, 2025
jakemac53
reviewed
Dec 19, 2025
6a1b1eb to
a4ca93a
Compare
a4ca93a to
4e358ad
Compare
Member
Author
|
URLs updated. |
jakemac53
reviewed
Jan 12, 2026
jakemac53
approved these changes
Jan 12, 2026
jakemac53
left a comment
Contributor
There was a problem hiding this comment.
LGTM with the caveat that I don't really have any flutter expertise
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 16, 2026
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 16, 2026
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 17, 2026
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 17, 2026
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 18, 2026
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 18, 2026
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 19, 2026
calltekk
pushed a commit
to calltekk/flutter
that referenced
this pull request
Jan 19, 2026
…lutter#179817) Co-authored-by: John Ryan <ryjohn@google.com>
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 19, 2026
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 19, 2026
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 20, 2026
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 20, 2026
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 20, 2026
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 20, 2026
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 20, 2026
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 21, 2026
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 21, 2026
4 tasks
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 21, 2026
johnpryan
added a commit
to flutter/website
that referenced
this pull request
Jan 22, 2026
_Description of what this PR is changing or adding, and why:_ This adds the new compressed rules files to our docs page. (flutter/flutter#179817) _Issues fixed by this PR (if any):_ _PRs or commits this PR depends on (if any):_ ## Presubmit checklist - [x] If you are unwilling, or unable, to sign the CLA, even for a _tiny_, one-word PR, please file an issue instead of a PR. - [x] If this PR is not meant to land until a future stable release, mark it as draft with an explanation. - [x] This PR follows the [Google Developer Documentation Style Guidelines](https://developers.google.com/style)—for example, it doesn't use _i.e._ or _e.g._, and it avoids _I_ and _we_ (first-person pronouns). - [x] This PR uses [semantic line breaks](https://github.com/dart-lang/site-shared/blob/main/doc/writing-for-dart-and-flutter-websites.md#semantic-line-breaks) of 80 characters or fewer. --------- Co-authored-by: Shams Zakhour <44418985+sfshaza2@users.noreply.github.com>
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 22, 2026
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 22, 2026
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 22, 2026
sfshaza2
added a commit
to flutter/website
that referenced
this pull request
Jan 22, 2026
_Description of what this PR is changing or adding, and why:_ This adds the new compressed rules files to our docs page. (flutter/flutter#179817) _Issues fixed by this PR (if any):_ _PRs or commits this PR depends on (if any):_ ## Presubmit checklist - [x] If you are unwilling, or unable, to sign the CLA, even for a _tiny_, one-word PR, please file an issue instead of a PR. - [x] If this PR is not meant to land until a future stable release, mark it as draft with an explanation. - [x] This PR follows the [Google Developer Documentation Style Guidelines](https://developers.google.com/style)—for example, it doesn't use _i.e._ or _e.g._, and it avoids _I_ and _we_ (first-person pronouns). - [x] This PR uses [semantic line breaks](https://github.com/dart-lang/site-shared/blob/main/doc/writing-for-dart-and-flutter-websites.md#semantic-line-breaks) of 80 characters or fewer. --------- Co-authored-by: Shams Zakhour <44418985+sfshaza2@users.noreply.github.com>
engine-flutter-autoroll
added a commit
to engine-flutter-autoroll/packages
that referenced
this pull request
Jan 23, 2026
flutter-zl
pushed a commit
to flutter-zl/flutter
that referenced
this pull request
Feb 10, 2026
…lutter#179817) Co-authored-by: John Ryan <ryjohn@google.com>
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
No description provided.