fix(codex): bound oversized rollout inspection - #1115
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📝 WalkthroughWalkthroughThe rollout classifier now performs bounded descriptor-based inspection, detects file changes during reads, validates first and latest metadata records, and reports indeterminate results for inspection failures. Tests cover invalid latest metadata and oversized rollouts. ChangesRollout inspection
Estimated code review effort: 3 (Moderate) | ~20 minutes Suggested reviewers: 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Actionable comments posted: 2
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@src/codex/native-residue.ts`:
- Around line 412-420: Update the validation loop in the residue-detection
function so both first and latest session_meta records are fully validated
before deciding the result; track whether either validated model_provider is
"opencodex", then return residue only after the loop, otherwise preserve the
existing indeterminate behavior. Add a focused regression test near the existing
native-residue tests covering a valid OpenCodex first record with invalid latest
metadata and asserting indeterminate.
- Around line 375-389: Update the rollout inspection flow around the content
read and JSONL loop to open and stat a single file descriptor, then read at most
the captured size using fixed-size chunks rather than readFileSync. Parse each
JSONL record incrementally without creating an array for all lines, restat the
same descriptor after reading, and return indeterminate for short reads or any
metadata change; preserve the existing unreadable-rollout handling.
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src/codex/native-residue.tstests/codex-native-residue.test.ts
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Actionable comments posted: 1
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@src/codex/native-residue.ts`:
- Around line 385-408: Replace the full-buffer conversion and subsequent
line-array parsing in the rollout inspection flow with incremental parsing of
bounded read chunks. Track only the current partial JSONL record plus the first
and latest session_meta payloads, processing each complete line as it arrives
and preserving behavior across chunk boundaries; remove the content.split("\n")
approach and avoid retaining all parsed lines.
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src/codex/native-residue.tstests/codex-native-residue.test.ts
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Actionable comments posted: 2
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@src/codex/native-residue.ts`:
- Around line 419-427: Update the descriptor-read loop around readSync to
enforce opened.size as the hard read bound: stop only when totalRead reaches
opened.size, request no more than the remaining observed bytes, and return
indeterminate if readSync returns zero before reaching that size. After the
bounded read, compare the post-read descriptor stat against opened before
continuing, preserving the existing inspection-limit handling.
- Around line 427-453: Update the read-and-parse flow around the chunk decoding
in the native residue implementation to use a single streaming TextDecoder,
decoding each buffer with stream mode and flushing it after the read loop before
processing the remaining partial text. Preserve the existing
rolloutSessionMetaPayload handling and first/latest assignments, and add a
focused regression test that splits a non-ASCII session ID across
ROLLOUT_READ_CHUNK_BYTES.
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Fix all unresolved CodeRabbit comments on this PR:
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src/codex/native-residue.tstests/codex-native-residue.test.ts
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Summary
This pull request is intentionally separate from the GitHub Copilot Responses normalization work in #1111, following maintainer review. It targets the native startup/history safety gap only.
Verification
bun test ./tests/codex-native-residue.test.ts— pass.bun run typecheck— pass.bun run privacy:scan— pass.git diff --check— pass.Checklist
Review readiness checklist
This PR stays in draft until every box below is ticked. Tick all four boxes once the requirements are met:
All CI tests are green on my local testing.
I pushed my PR to the latest dev commit.
I resolved all correct Codex and CodeRabbit findings.
My PR is ready for review.
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