fix(tools): track indented MDX code fences - #2329
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Included review availability: Your plan provides up to 12 included reviews per hour; 11 remain after this review. 📝 WalkthroughWalkthroughThe MDX checker now uses one AWK fence tracker for both diagnostic scans. It handles indented backtick and tilde fences, matching whitespace-only closers, CRLF endings, and list-container scope. Tests cover fence closure, EOF handling, list boundaries, info strings, and malformed fence lookalikes. Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: ⚪ Minimal · up to This localized tooling change corrects MDX fence tracking for indented fences and info strings, with regression fixtures covering the affected cases. No actionable merge-blocking risk remains after normal checks and review. Suggested reviewers: 🚥 Pre-merge checks | ✅ 4✅ Passed checks (4 passed)
Full details: Linked Issues checkExplanation The changes address the relevant objectives in ✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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Inline comments:
In `@tools/check-docs-mdx`:
- Around line 133-140: The fence-closing checks in both trackers within
tools/check-docs-mdx must accept an optional terminal carriage return before the
line ending, while still allowing only whitespace otherwise. Update the checks
at tools/check-docs-mdx lines 133-140 and 160-167, and add a CRLF fixture
containing a prose hazard after the closing fence to verify subsequent hazard
detection.
In `@tools/check-docs-mdx_test.sh`:
- Around line 299-318: Extend the Fixture 7 tests with a complementary case
using a three-space opening fence and a column-zero closing fence, then add
prose containing the existing placeholder hazard after the block. Run the new
fixture through run and assert a nonzero result plus the expected “bare <word>
tag” diagnostic, matching the existing indented-closer checks.
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Inline comments:
In `@tools/check-docs-mdx_test.sh`:
- Around line 446-450: Update the CRLF fixture test around crlf-closer.md to
place a void element after the closing code fence, then assert the corresponding
CRLF-rule diagnostic in addition to the existing bare-tag check. Preserve the
nonzero exit assertion and the broader MDX-hazard coverage.
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Inline comments:
In `@tools/check-docs-mdx_test.sh`:
- Around line 704-734: Isolate each fixture’s diagnostic assertions so output
from one Markdown file cannot satisfy checks for another. Apply this to the
empty-list fixtures and the corresponding fixtures 14 and 28, using separate
directories or assertions that require both the filename and diagnostic;
preserve the expected nonzero exit and file-specific diagnostics.
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Related to #2144 Signed-off-by: Varun Ramesh <varamesh@nvidia.com>
Related to #2144 Signed-off-by: Varun Ramesh <varamesh@nvidia.com>
Related to #2144 Signed-off-by: Varun Ramesh <varamesh@nvidia.com>
Related to #2144 Signed-off-by: Varun Ramesh <varamesh@nvidia.com>
Related to #2144 Signed-off-by: Varun Ramesh <varamesh@nvidia.com>
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Multi-persona review — fix(tools): track indented MDX code fences
Method: four independent persona reviewers (Correctness · Shell/awk Portability · Test-coverage · Domain/Architecture) → an adversarial senior meta-reviewer that re-derived every finding from the resolved code at 25d5e15f. All findings were confirmed real; none refuted; most were re-tiered down because the authoritative parse gate backstops this fast checker.
Legend: 🔴 Blocker · 🟠 Major · 🟡 Minor · 🔵 Nitpick
Overall assessment
Solid, careful PR. It teaches the fast MDX checker the CommonMark fence rules it was missing (0–3-space indented openers, delimiter-only closers, CRLF closers, backtick-in-info-string = prose, and a deliberately-narrow direct-list scope), and — the best structural change — de-duplicates the two hand-maintained awk trackers into a single shared FENCE_AWK, fixing the real drift bug where a fix could land in one copy and not the other. The header docs are rewritten honestly, the 22 shell fixtures pass (verified locally on BSD awk 20200816), and the docs-mdx merge-gate runs check-docs-mdx-parse (the real @mdx-js/mdx parser) in the same required job — so the newly-admitted false-negative direction cannot merge invalid MDX.
No blockers, no majors. The two 🟡 items are worth a look but are bounded (slow-feedback misses, not bad-merge risks); everything else is polish. Inline comments below.
Confirmed non-issues (examined, not flagged)
- 4-space-indented closer is correctly treated as content, not an early close (matches CommonMark).
readonly FENCE_AWK+ string concatenation forms a valid program across POSIX/gawk/mawk/BSD awk.\r/\tregex escapes and function-local params are portable / POSIX-idiomatic.- The shared
FENCE_AWKgenuinely fixes the prior two-copy tracker-drift bug. - The parse gate runs in the same required merge-gate job → a false negative here cannot merge invalid MDX.
(Note: CodeRabbit has already left an informational bot review on this PR.)
Summary
| 🔴 Blocker | 🟠 Major | 🟡 Minor | 🔵 Nitpick |
|---|---|---|---|
| 0 | 0 | 2 | 8 |
Recommendation: Approve with comments. The two 🟡s (marker breadth for 2nd+ ordered items; the unpinned len>=flen close rule) are the only items worth a nudge — both have concrete, verified, low-risk fixes.
| # Deliberately narrow list recognition: direct top-level bullets and | ||
| # ordered items starting at 1, with a normal content indent <= 3. | ||
| # Exclude thematic breaks, which otherwise resemble bullet items. | ||
| marker = !($0 ~ /^(-[ \t]*){3,}\r?$/ || $0 ~ /^(\*[ \t]*){3,}\r?$/) && match($0, /^([-+*]|1[.)]) +/) |
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🟡 Minor — Unclosed fence under a 2./3) ordered item (2nd+) hides following prose hazards
The list-scope marker regex /^([-+*]|1[.)]) +/ only matches an ordered item literally starting with 1. In step 2+ of a numbered procedure (2., 3)), list_indent is never set, so a fence opened there gets fscope=0 and the outdent-ends-scope guard (L155, fscope > 0) never fires — an accidentally unclosed fence then runs to EOF and silently swallows every column-0 prose hazard after the list. Bullets re-match on every item, so a bullet second item flags the same hazard. Reproduced: a 2-item numbered list with an unclosed fence in item 2 + trailing <placeholder> prints OK (rc 0); the bullet equivalent flags it.
Blast radius: Documented as a 'later list items are parser-owned' non-goal and backstopped by the blocking check-docs-mdx-parse gate, so this is a slow-feedback-loop miss, not a bad-merge risk — hence Minor. But the 1.-vs-2. and ordered-vs-bullet asymmetry is surprising.
Fix: Broaden the ordered alternative and accept a tab separator (verified: fixes it, zero false positives on prose, full suite green; also subsumes the tab-separator nitpick): match($0, /^([-+*]|[0-9]{1,9}[.)])[ \t]+/). The existing RLENGTH <= 3 gate still excludes wide markers, and recognizing more markers only adds outdent-based closing (the false-negative-safe direction).
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| if (in_fence) { | ||
| if (is_fence && ch == fch && len >= flen && rest ~ /^[ \t]*\r?$/) { in_fence = 0; fscope = 0; next } |
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🟡 Minor — The len>=flen close rule is entirely unpinned; a len==flen regression silently hides hazards while the suite stays green
Every fixture opens and closes with equal-length 3-char runs, so this closer-length comparison is never exercised with a longer or shorter closer. Verified: flipping len >= flen to len == flen makes a valid longer closer (``` → ````) fail to close → fence-to-EOF hides every later hazard (the dangerous false-negative direction) — and the entire fixture suite still reports pass.
Blast radius: A real doc using a longer closing fence than its opener (valid CommonMark) would have all subsequent prose hazards hidden with zero test signal against a plausible future regression.
Fix: Add a fixture with a 4-backtick opener / inner 3-backtick line (must NOT close) / 4-backtick closer + trailing <placeholder> (must be flagged), plus the inverse 3-open/4-close proving the longer closer DOES close. Both behave correctly today.
| # Deliberately narrow list recognition: direct top-level bullets and | ||
| # ordered items starting at 1, with a normal content indent <= 3. | ||
| # Exclude thematic breaks, which otherwise resemble bullet items. | ||
| marker = !($0 ~ /^(-[ \t]*){3,}\r?$/ || $0 ~ /^(\*[ \t]*){3,}\r?$/) && match($0, /^([-+*]|1[.)]) +/) |
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🔵 Nitpick — Tab after a list marker (1.Item) defeats list-scope tracking (same class as the ordered-marker gap)
The marker separator is a literal +, not [ \t]+, so 1.<TAB>Item fails to match and list_indent is never set — an unclosed fence under it then swallows the trailing hazard. Same root cause and same fix as the ordered-marker finding above.
Blast radius: Exotic trigger (tab after an ordered marker) and parse-gate-backstopped.
Fix: Folds into the marker fix above: use [ \t]+ as the separator.
| { | ||
| blank = ($0 ~ /^[ \t]*\r?$/) | ||
| ind = indent_width($0) | ||
| is_fence = match($0, /^ {0,3}(`{3,}|~{3,})/) |
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🔵 Nitpick — Fence regexes need POSIX interval expressions {n,m} — pre-existing, CI-safe
The fence and thematic-break regexes use {0,3}/{3,} intervals; busybox awk and mawk 1.3.3 treat { literally and would match no fences. This is pre-existing ({3,} is already on main), and macOS BSD awk plus CI's awk both support intervals, so no regression is introduced and CI is unaffected.
Blast radius: A contributor on a minimal Debian/Alpine/busybox image without an interval-capable awk gets a checker that mis-scans fenced code.
Fix: Optional (out of scope for this PR): a one-line preflight rejecting an interval-incapable awk, or resolving gawk when present, would close the portability cliff.
| in_fence { next } | ||
| done < <(awk -v fm_end="${FM_END}" "${FENCE_AWK}"' | ||
| { print NR": "$0 } | ||
| ' "$file" | grep -E "<(${VOID_ELEMENTS})([[:space:]][^>]*)?" | grep -Ev "<(${VOID_ELEMENTS})([[:space:]][^>]*)?[[:space:]]*/>" || true) |
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🔵 Nitpick — check 1 fails open (|| true) while checks 2-6 fail closed on an awk error
Check 1's awk | grep | grep || true masks an awk failure and treats the file as clean (fail-open / false-negative), whereas checks 2-6 use if ! awk ... (fail-closed). Pre-existing asymmetry inherent to the grep-based check 1; only manifests when awk itself cannot run the program.
Blast radius: On an unsupported awk, void-element hazards (check 1) would be silently missed while the same environment screams false positives on checks 2-6.
Fix: Optional: capture awk's exit status in check 1 (drop the blanket || true, or split the awk stage from the grep) so a broken dialect is surfaced rather than swallowed.
| check_rc_zero "fence-length-exits-zero" | ||
| check_absent "fence-length-no-violation" "bare < not starting a valid tag" | ||
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| # --- Fixture 6: fence opener indented beneath a list item. --- |
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🔵 Nitpick — Fixture 6 cannot self-verify its indented closer (belt-and-suspenders)
Fixture 6 (the headline indented-opener case) has no prose after its closing fence, so it would still pass if the 3-space-indented closer were never recognized — the fence would just run to EOF, hiding the same hazards. It confirms the opener opens but not that the closer closes.
Blast radius: Low: indented-closer recognition IS pinned by fixture 7 (breaking it fails two tests) and column-0 post-prose is protected by the outdent guard regardless; no suite-passing false negative could be constructed.
Fix: Optional: add a line of post-close prose containing a <placeholder> (and a <br>) to make fixture 6 self-verifying, matching fixtures 7/7b/16.
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| if (in_fence) { | ||
| if (is_fence && ch == fch && len >= flen && rest ~ /^[ \t]*\r?$/) { in_fence = 0; fscope = 0; next } |
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🔵 Nitpick — Cross-delimiter non-close (ch==fch) is unexercised by any fixture
No fixture places a ~~~ line inside a ``` fence (or vice-versa), so the ch == fch requirement in this close rule is untested.
Blast radius: Low: the failure mode of dropping it is over-close → content exposed → false positive, the safe/noisy direction.
Fix: Optional: add a fixture with a ``` opener containing a ~~~ line and a later in-fence hazard, asserting rc-zero.
| check_absent "indented-opener-hides-check-5" "bare <word> tag" | ||
| check_absent "indented-opener-hides-check-6" "bare < not starting a valid tag" | ||
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| # --- Fixture 7: closer indented independently of the opener. --- |
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🔵 Nitpick — Fixtures 7/7b omit check-1 void coverage (breaks the suite's own convention)
Fixtures 7 and 7b assert only the <word> (checks 2-6) pass on the post-block prose and omit a <br> for check 1, unlike fixtures 8/13/14/16 which cover both passes.
Blast radius: Negligible — the shared FENCE_AWK prologue makes cross-pass drift structurally impossible; this is consistency only.
Fix: Optional: add a <br> on its own line after the block in fixtures 7 and 7b and assert non-self-closing void element is reported.
| next | ||
| } | ||
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| # Deliberately narrow list recognition: direct top-level bullets and |
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🔵 Nitpick — Stateful container mini-parser vs the 'lexical approximation' contract (scope-creep note)
The list_indent/fscope/marker logic is a small stateful CommonMark list-container parser inside a tool whose stated contract is a fast lexical approximation, with @mdx-js/mdx as the real parser.
Blast radius: Maintainability only; correctness is backstopped by the blocking parse gate. Justified here — indented fences are the normal list-item shape and were the #2144 false-positive source, and the shared tracker removes the prior two-copy drift.
Fix: Consider a maintainer guideline that further container heuristics (nested / mixed / ordered-continuation) stay deferred to check-docs-mdx-parse rather than growing this tracker.
| # spaces, and closes only on an explicit later line whose leading run is the | ||
| # SAME character, at least as long, and followed by nothing but whitespace. | ||
| # Thus ```yaml starts a fence when outside one and is content, not a closer, | ||
| # when inside one. For an immediate direct top-level bullet or 1. item whose |
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🔵 Nitpick — Header word 'immediate' overstates fence-to-marker adjacency
Header lines 41-42 say 'For an immediate direct top-level bullet or 1. item ...'. Traced: list_indent persists through blank and non-outdenting continuation lines, so a fence separated from the marker by an indented paragraph is still scoped and outdent-closes.
Blast radius: Documentation clarity only.
Fix: Drop 'immediate' (redundant with 'direct top-level'), or reword to 'a direct top-level bullet or 1. item'.
2 participants
Summary
tools/check-docs-mdxonly recognised code fences at column 0, so an indented fence — the normal shape inside a list item — was read as prose and its contents flagged. Teaches the tracker the CommonMark fence rules it was missing, and ends a fence when its direct list item ends. Richer container structure stays withcheck-docs-mdx-parse, the authoritative gate.Motivation / Context
tools/check-docs-mdxprovides fast, dependency-free feedback for common MDX hazards. It is intentionally a lexical approximation, not the Fern publish-safety boundary.tools/check-docs-mdx-parseis the authoritative parser-level merge gate that prevents invalid MDX from reaching publication.The fast checker misread three CommonMark-legal fence forms, producing false positives that blocked documents accepted by the authoritative parser:
scanned as prose;
in the wrong state;
```yamlwas incorrectlytreated as a closer.
This PR aligns the fast checker with the bounded fence behavior required by #2144. It does not attempt general Markdown or MDX container parsing; richer list structure, mixed containers, and other documented limitations remain owned by
check-docs-mdx-parse.Fixes: #2144
Related: #2145
Type of Change
Component(s) Affected
cmd/aicr,pkg/cli)cmd/aicrd,pkg/server)pkg/recipe)pkg/bundler,pkg/component/*)pkg/collector,pkg/snapshotter)pkg/validator)pkg/errors,pkg/k8s)docs/,examples/)tools/check-docs-mdxImplementation Notes
Scope. Only gap 3 of check-docs-mdx: close residual CommonMark gaps and duplicate diagnostics #2144 remained. Gaps 1 and 2 shipped in ci(docs): block merges on parser-level MDX validation #2145 (
77ab263e) — verified:<3emits exactly one diagnostic, fixture 2c exists, and the header already scopes code-handling to checks 2-6.Fence rules added. The tracker previously knew only "same delimiter character, at least as long". It now also honours:
```yamlopens a block and never closes one\r, so a CRLF-terminated closer still closesnot an opener (tilde fences are exempt) — needed once indented openers
are recognised, or such a line opens a fence that never closes
Direct-list scope. A fence opened inside a top-level bullet or
1.item whose content indent is at most three ends when any nonblank outdent leaves that item — CommonMark ends a list-scoped fence at the container boundary without a closing delimiter. Without this, recognising indented fences means an unclosed one swallows the rest of the file.Deliberate limits, documented in the script header. Later list items, lazy paragraph continuations, nested lists, and mixed containers (tables, blockquotes) are parser-owned. On those shapes this checker can report OK where
check-docs-mdx-parserejects; the authoritative parse gate runs immediately afterward, so invalid MDX cannot merge. Such disagreements are expected outside the supported lexical subset. A diagnostic from the old checker alone does not establish a regression because it could result from scanning valid fenced code as prose. Multi-line code spans remain a documented limitation, which check-docs-mdx: close residual CommonMark gaps and duplicate diagnostics #2144 permits in place of a fix.Shared tracker. Check 1 and checks 2-6 run separate awk programs but must agree on what counts as code. The tracker is now defined once in
FENCE_AWKand concatenated into both. It was previously duplicated, which is how earlier fixes landed in one copy and not the other.Both trackers exercised. Fixtures carry a
<br>as well as a<placeholder>on separate lines — check 1 only sees void elements, so a<word>hazard alone cannot detect a regression in its copy. Check 5 skips any line containing a void element, hence the separate lines.This PR supports only:
by whitespace;
1.item safeguard documented inthe script.
Explicit non-goals, owned by
check-docs-mdx-parse:Testing
make test-shell
make lint
make check-docs-mdx
make check-docs-mdx-parse
All pass. make lint reports 0 golangci-lint issues, license headers OK,
AGENTS.md in sync, all doc files MDX-safe, 54 doc files parse as MDX.
Every fixture was verified to fail when its specific fix is reverted,
including reverting each tracker independently:
Risk Assessment
Rollout notes: N/A
Checklist
make testwith-race)make lint)git commit -S) — GPG signing info