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feat(agents-md-integrity): add total and per-line character limits - #386
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The line ceiling alone lets an arbitrarily large file pass, since a paragraph is one line: a 111-line AGENTS.md carrying 213k chars, one paragraph 89k, was green. Add three optional inputs, applied to the root agents file and every nested one the walk already measures: - max_chars: hard ceiling on total chars; over it fails. Default 0 = off, so bumping the pin never turns an existing caller red (40000 suggested). - warn_chars: total-char target; over it warns. Default 25000. - max_line_chars: per-line ceiling; a longer line warns. Default 3000. Each finding names the file, its size (+ chars/4 token estimate), its longest lines, and the remedy (move rationale into docs/agents/, leave a pointer). Line checks are unchanged.
mattmillerai
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📝 WalkthroughWalkthroughThe AGENTS.md integrity checker now measures total character counts and per-line lengths for root and nested files. Configurable thresholds produce hard-limit failures or warnings. The reusable workflow exposes these settings, and tests and documentation describe their behavior. ChangesAGENTS.md character limits
Sequence Diagram(s)sequenceDiagram
participant Workflow as Reusable workflow
participant Checker as check_agents_md.py
participant Files as AGENTS.md files
Workflow->>Checker: Pass character-limit environment variables
Checker->>Files: Read and measure decoded content
Files-->>Checker: Return content for size checks
Checker-->>Workflow: Report warnings or hard-limit failures
Priority: ⬇️ Low Merge Risk: 🔵 Low · up to Files using CRLF endings may pass a configured character ceiling despite exceeding it. This is a bounded issue to fix or accept before merging. 🚥 Pre-merge checks | ✅ 2✅ Passed checks (2 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
✨ Simplify code
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Inline comments:
Review comments at @.github/agents-md-integrity/check_agents_md.py:
- Line 219: Update the file-reading logic that supplies `text` to `len(text)` to
preserve CRLF endings by disabling newline translation, and add a CRLF boundary
test confirming each carriage return and line feed counts toward `MAX_CHARS`.
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.github/agents-md-integrity/README.md.github/agents-md-integrity/check_agents_md.py.github/agents-md-integrity/tests/test_check_agents_md.py.github/workflows/agents-md-integrity.yml.github/workflows/test-agents-md-integrity.ymlREADME.mddocs/callers/agents-md-integrity.md
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🔍 Cursor Review — Consolidated panel
Triggered by @mattmillerai.
Found 5 finding(s).
| Severity | Count |
|---|---|
| 🟡 Medium | 1 |
| 🟢 Low | 2 |
| ⚪ Nit | 2 |
Panel: 4/6 reviewers contributed findings.
Reviewers that did not contribute: kimi-k3-high:adversarial (error), kimi-k3-high:edge-case (error)
…ceiling Read with newline="" so universal-newline translation no longer folds each CRLF to one char, which let a CRLF file slip under max_chars. Adds a CRLF boundary test (fails without the fix). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…s on CR/LF only - MAX_CHARS/WARN_CHARS/MAX_LINE_CHARS that don't parse (40k, 40000.5) now exit 2 instead of falling back — the fallback for MAX_CHARS is 0, which silently switched off the ceiling the caller asked for. - Lines split on CRLF/LF/CR only; str.splitlines() also broke on U+2028, NEL and \f, letting a pasted paragraph slip under max_line_chars and shifting the L<n> numbers. - Longest-lines ranking is built only when a finding fires, via heapq. - The remedy text says the pointer must be a plain link, not an @ import. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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🤖 The reviews loop filed Linear follow-up ticket(s) for review thread(s) deferred as out of scope for this PR:
The following carry
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2 participants
ELI-5
The AGENTS.md checker only counted lines, so a file could stay at 111 lines and still be 200k+ characters, because one paragraph counts as one line. Everything in that file gets loaded into every agent session. This PR adds character limits too, on the root file and on every nested
AGENTS.md. By default they only warn, so no caller goes red when it bumps its pin.What changed
New optional inputs on
agents-md-integrity.yml(envMAX_CHARS/WARN_CHARS/MAX_LINE_CHARSon the script):max_chars0(off)40000is suggested, matching Claude Code's oversized-memory-file floor.warn_chars25000max_line_chars3000AGENTS.mdthe walk already visits.exclude_pathsstill prunes as before.L42 (89015 chars)), and the fix: move the rationale intodocs/agents/and leave a one-line pointer (a plain link, not an@import).splitlines()), soL<n>matches an editor._size_findingshelper that both the root and nested paths call, and the existing messages are kept word for word.docs/callers/agents-md-integrity.md(Inputs table + a "warn-first" gotcha), the checker README, and the catalog row inREADME.md.Judgment calls
max_charsdefaults to off, not40000. The ticket asks that existing callers not break, and a hard 40000 default would fail every oversized caller the day it bumps. The two warn limits default on, so oversized files show up right away without failing anything.max_line_charsis always warn-only. The ticket asks for "warn-only by default" but only names three inputs. I didn't add a fourth input just to escalate long lines to failures;max_charsalready supplies the failing ceiling.40k,40000.5) is a config error (exit 2), not a fallback to the default. Formax_charsthe default is "off", so a fallback would quietly disable the ceiling the caller asked for.40000.0is accepted.max_lines/warn_lineskeep their existing fallback.Residual
max_chars: 40000set.max_charsfleet-wide means each caller sets it after its warnings are cleared. I didn't sweep the callers to count how many files are currently over 25000 chars or have lines over 3000 chars, so I don't know how many would warn after a bump.MAX_LINES/WARN_LINESvalue is still silently replaced by its default. Only the new character limits are strict.CLAUDE.mditself is not measured, so Claude-only text below the@AGENTS.mdimport escapes the character limits. This is proposed as a follow-up.Provenance
agents-md-integritysuite green (62 tests). New tests cover pass, warn, fail, at-limit,0=off, nested, exclusions, line checks unchanged, env wiring, defaults-pass, CRLF counted as two, U+2028/NEL not splitting a line, and exit 2 on a non-integer limit. The CRLF test was confirmed to fail without the fix.test-agents-md-integrity.yml(default warns + exit 0;MAX_CHARS=40000exits 1) passes locally.workflow-pinssuite green, including the declared-vs-documented input drift harness.check_workflow_pins.py,check-org-repo-literals.sh,check_agents_md.py --root ..max_line_charscannot be escalated to a failure (it is warn-only, see Judgment calls).