fix(#5393): defer validation until all retry iterations complete - #5395
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🤖 Finished Review · ✅ Success · Started 10:05 PM UTC · Completed 10:23 PM UTC |
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Labels: PR modifies the agent runner validation loop in internal/cli/run.go, which is core runner lifecycle behavior beyond the existing component/harness and component/sandbox labels. Previous runReviewFindingsLow
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Labels: PR modifies harness validation loop (internal/cli/run.go) and sandbox symlink sanitization (internal/sandbox/sandbox.go) |
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Follow-up multi-agent review pass (3 independent reviewers). One existing thread ("fail-open" on line 1391) was corrected from LOW to CRITICAL after verification showed the stated mitigation doesn't hold — SafeDownload's sanitization failures are downgraded the same way and can reach the post-script. 5 new findings below: 1 HIGH (post-loop sweep validates against a stale/shared repo checkout) and 4 MEDIUM (missing test coverage for the new control flow in two spots, and two premature-decision findings where justifying comments assert unverified/incorrect claims as fact). All findings were independently verified against the PR head branch source before posting.
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/fs-fix |
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🤖 Finished Fix · ✅ Success · Started 6:56 PM UTC · Completed 7:09 PM UTC |
🔧 Fix agent — iteration 1 (human-triggered)Addressed 4 of 5 review findings. Fixed the HIGH-severity stale TARGET_REPO_DIR in the post-loop sweep by clearing it in the validation env and documenting the constraint. Fixed both premature-decision comments to remove unverified claims. Added a real failure-path test for errSymlink via sanitizeDownload. Also fixed StepWarn messages to use the established past-tense pattern. Disagreed with 1 finding (retry loop integration test coverage requires injectable sandbox infrastructure that does not exist). Fixed (4):
Disagreed (1):
Tests: passed Updated by fullsend fix agent |
- Clear TARGET_REPO_DIR in post-loop validation sweep env since hostRepositoryDownloadDir is a shared path that only reflects the last iteration's extraction attempt (HIGH finding) - Rewrite errSymlink comment to describe what the type actually improves (structured error context) without claiming an unverified panic mechanism (MEDIUM premature-decision) - Scope extraction non-fatal comment to document the constraint that validation scripts must not depend on TARGET_REPO_DIR (MEDIUM premature-decision) - Add TestSanitizeDownload_RemoveFailureReturnsErrSymlink to exercise the real os.Remove failure path via read-only parent directory and assert *errSymlink via errors.As (MEDIUM test coverage) - Fix StepWarn messages to use established past-tense pattern Addresses review feedback on #5395
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/fs-review |
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🤖 Finished Review · ✅ Success · Started 7:31 PM UTC · Completed 7:47 PM UTC |
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/fs-fix Status check against the latest review pass (head SHA aa59b83). I've already resolved the 5 threads that commit aa59b83 genuinely fixed (error-message-consistency, comment-style, the new sanitizeDownload real-failure-path test, and both premature-decision comment rewrites) — no action needed there. The following remain open and need work, quoted verbatim from the original review threads so nothing gets lost in paraphrase: CRITICAL — still unaddressed —
This is not fixed in aa59b83 — the HIGH — partially fixed —
Commit aa59b83 fixed only the narrow symptom: it now passes MEDIUM — disputed last round —
Your prior response disagreed, citing lack of injectable sandbox infrastructure, and recommended "a follow-up issue for adding injectable sandbox support to enable retry loop integration tests." If that's a real out-of-scope infrastructure gap, please actually file that follow-up issue and reference it in this PR's description so it's tracked, rather than leaving the disagreement undocumented outside this thread. If a smaller-scope test is feasible instead (e.g. extracting the fail-open/sweep branching logic in run.go into a pure function testable without a real sandbox), that would be preferable to a filed issue. MEDIUM — new this round —
This is the same underlying gap as the earlier "naming-coherence" Low finding ( LOW — new this round, low priority but cheap to fix:
Codecov: patch coverage has not yet reported for commit aa59b83. The prior commit's patch coverage was 50% with 9 lines missing. Please check the fresh report once it lands and address any remaining gaps, particularly in the retry/validation control-flow branches called out above. |
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🤖 Finished Fix · ✅ Success · Started 7:56 PM UTC · Completed 8:08 PM UTC |
SafeDownload failures were non-fatal when a validation loop was configured, but SafeDownload is a security boundary (Download + sanitizeDownload). If sanitizeDownload aborts mid-walk, dangerous symlinks can survive in hostRepositoryDownloadDir and reach the post-script — a regression from the prior fail-closed behavior. When SafeDownload fails with a validation loop: - Clean up hostRepositoryDownloadDir (remove unsanitized content) - Continue the retry loop (output files from 9b are unaffected) Add repoExtractedOK flag to guard both in-loop validation's TARGET_REPO_DIR and the post-script's REPO_DIR — neither receives the repo path unless the last extraction succeeded. Addresses review feedback on #5395
🔧 Fix agent — iteration 2 (human-triggered)Addressed both remaining review findings (CRITICAL SafeDownload fail-open, HIGH REPO_DIR stale state). SafeDownload failures now clean up unsanitized content and continue the retry loop. A new repoExtractedOK flag guards both in-loop validation TARGET_REPO_DIR and post-script REPO_DIR, ensuring neither receives the repo path when extraction failed. Fixed (2):
Tests: passed Decision points
Updated by fullsend fix agent |
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/fs-review |
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🤖 Finished Review · ✅ Success · Started 9:00 PM UTC · Completed 9:19 PM UTC |
Two changes to the harness execution pipeline: 1. Make repo extraction (SafeDownload, os.RemoveAll) failures non-fatal when a validation loop is configured. Previously, extraction failures inside the retry loop caused an immediate return, aborting subsequent iterations. Now failures are logged as warnings and the loop continues, allowing later iterations to produce valid output. 2. Add a post-loop validation sweep that checks all completed iteration directories (latest first) if no iteration passed inline validation. This catches the case where extraction failed on the iteration that produced valid output but the output files were already extracted independently. 3. Add errSymlink error type in the sandbox package with a proper Error() method. The sanitizeDownload function now wraps symlink removal failures in errSymlink, which provides context (path, target) and prevents fmt.Sprintf panics when the error reaches a deferred cleanup handler that formats it for logging. Closes #5393
- Clear TARGET_REPO_DIR in post-loop validation sweep env since hostRepositoryDownloadDir is a shared path that only reflects the last iteration's extraction attempt (HIGH finding) - Rewrite errSymlink comment to describe what the type actually improves (structured error context) without claiming an unverified panic mechanism (MEDIUM premature-decision) - Scope extraction non-fatal comment to document the constraint that validation scripts must not depend on TARGET_REPO_DIR (MEDIUM premature-decision) - Add TestSanitizeDownload_RemoveFailureReturnsErrSymlink to exercise the real os.Remove failure path via read-only parent directory and assert *errSymlink via errors.As (MEDIUM test coverage) - Fix StepWarn messages to use established past-tense pattern Addresses review feedback on #5395
SafeDownload failures were non-fatal when a validation loop was configured, but SafeDownload is a security boundary (Download + sanitizeDownload). If sanitizeDownload aborts mid-walk, dangerous symlinks can survive in hostRepositoryDownloadDir and reach the post-script — a regression from the prior fail-closed behavior. When SafeDownload fails with a validation loop: - Clean up hostRepositoryDownloadDir (remove unsanitized content) - Continue the retry loop (output files from 9b are unaffected) Add repoExtractedOK flag to guard both in-loop validation's TARGET_REPO_DIR and the post-script's REPO_DIR — neither receives the repo path unless the last extraction succeeded. Addresses review feedback on #5395
- Merge main to pick up forceRemoveAll (PR #5474); switch both os.RemoveAll(hostRepositoryDownloadDir) call sites (pre-clear and cleanup-after-extraction-failure) to forceRemoveAll to handle read-only directories left by sandbox enforcement. - Fix post-loop sweep iteration tracking: when the sweep validates iteration i != runCount, clear repoExtractedOK so the post-script receives empty REPO_DIR rather than a mismatched checkout. Extract postLoopValidationSweep into a testable helper returning sweepResult. - Add 6 unit tests for postLoopValidationSweep covering: latest-iter pass, earlier-iter pass (clears repoOK), none pass, TARGET_REPO_DIR always empty during sweep, and repoExtractedOK preservation logic. Addresses review feedback on #5395
Add a design comment near the validation loop explaining why both inline validation (early exit) and the post-loop sweep (#5393) are necessary. Update the cli-internals.md flow diagram to reflect the dual-phase model, non-fatal SafeDownload under validation_loop, and the TARGET_REPO_DIR="" constraint in the sweep. Also: fix misleading comment about REPO_DIR handling (post-scripts fail closed, not gracefully), and simplify dead-code repoExtractedOK check at step 9e (always true at that point). Addresses review feedback on #5395
…IDATED_ITERATION_DIR The post-loop validation sweep returns which iteration passed validation (sweep.validatedIter), but the call site discarded this value. Post-scripts independently selected the last iteration's output, which could be schema-invalid content from a failed iteration — defeating the purpose of the validation sweep (#5393). Changes: - Track validatedIterNum in runAgent and set it on both inline validation pass (step 9e break) and sweep pass - Pass FULLSEND_VALIDATED_ITERATION_DIR=<runDir>/iteration-<N>/output to the post-script environment when a validation loop is configured and an iteration passed validation - Update all 5 validation_loop-enabled post-scripts (review, triage, retro, prioritize, fix) to prefer FULLSEND_VALIDATED_ITERATION_DIR when set, falling back to last-iteration scanning for backward compatibility - Update cli-internals.md flow diagram to document the new env var Addresses review feedback on #5395
The code comment and cli-internals.md diagram claimed post-scripts generally fail closed on empty REPO_DIR. In fact only post-fix.sh checks it; post-review.sh, post-triage.sh, post-retro.sh, and post-prioritize.sh don't reference REPO_DIR at all, and post-code.sh is unaffected since code.yaml has no validation_loop. Also documents a known limitation surfaced by review: since there is no per-iteration repo checkout, post-fix.sh cannot recover a sweep-validated non-final iteration's repo state and fails closed with "Extracted repo not found" instead of pushing. Assisted-by: Claude Signed-off-by: Wayne Sun <gsun@redhat.com>
…ption Review squad follow-up on PR #5395 found two issues in the previous commit's own changes: - The claim "only post-fix.sh fails closed on empty REPO_DIR" was itself inaccurate: post-code.sh has the identical fail-closed check in its own script logic. It just can't currently observe an empty REPO_DIR because code.yaml has no validation_loop, so the extraction failure path that clears REPO_DIR is unreachable for it today — but the check is real, not dead code, and would activate the moment code.yaml gained a validation_loop. - The forceRemoveAll pre-clear was downgraded to non-fatal based on an unverified assumption that SafeDownload's Download step (an external "openshell sandbox download" call) fully replaces a stale, non-empty destination directory rather than merging onto it. Nothing in this codebase confirms that behavior. Treat a failed pre-clear the same as a SafeDownload failure instead: skip the iteration's repo state rather than extracting into a directory of unknown provenance. Assisted-by: Claude Signed-off-by: Wayne Sun <gsun@redhat.com>
…R lookup The prefer-validated-dir logic added in 600df8d falls through to a full rescan of iteration-*/output whenever the expected filename is missing at FULLSEND_VALIDATED_ITERATION_DIR — not just when the env var itself is unset. validate-output-schema.sh accepts "result.json" as a fallback filename during validation without renaming it to agent-result.json (or fix-result.json for post-fix.sh), so a validated iteration that used that filename would fail the presence check and silently fall back to scanning for the last iteration directory — which could be a later, schema-invalid iteration. This reintroduces exactly the class of bug #5393/#5395 fixed for the shipped scaffolded scripts. Check the same result.json fallback at the validated directory instead of falling through to the rescan, and tighten the downstream emptiness checks in post-triage.sh/post-retro.sh/post-prioritize.sh to also verify file existence so a missing result still fails closed with a clear error rather than reaching jq on a nonexistent path. Also updates the building-custom-agents.md example post-script, which still showed the pre-#5393 "always rescan" pattern. Assisted-by: Claude Signed-off-by: Wayne Sun <gsun@redhat.com>
Adds the test coverage flagged as missing during review-squad follow-up on PR #5395: neither the Go-side REPO_DIR/FULLSEND_VALIDATED_ITERATION_DIR env construction nor the shell-side prefer/fallback logic in the five post-scripts had direct tests, which is how the fail-open regression fixed in 3aa1d71 shipped unnoticed. - Extract the post-script env-var construction out of the defer closure into postScriptRepoEnv (internal/cli/run.go), and add TestPostScriptRepoEnv covering all four repoExtractedOK/validatedIterNum/ ValidationLoop combinations. - Add FULLSEND_VALIDATED_ITERATION_DIR fallback tests to post-review-test.sh, post-triage-test.sh, post-retro-test.sh, and post-prioritize-test.sh, invoking the real scripts with mocked gh/fullsend binaries: validated dir with the expected filename, validated dir with the result.json fallback, and validated dir with neither file (must fail closed, never silently use a later iteration). - post-fix.sh's test harness reimplements logic in isolation rather than invoking the real script (it needs git/gitleaks/python3), so add select_fix_result_file as a matching reimplementation with the same three cases plus a legacy no-env-var rescan sanity check. Assisted-by: Claude Signed-off-by: Wayne Sun <gsun@redhat.com>
…nges Agent scripts (agents/*.md, harness/*.yaml, scripts/pre-*.sh, scripts/post-*.sh, and their tests) have moved to fullsend-ai/agents, the canonical source per ADR 0058's extraction plan. PR #5425 (fullsend-ai/fullsend) confirms the disk-based scaffold fallback for agent resolution is now unreachable for real installations — all customers resolve agents via config or the fullsend-ai/agents runtime fallback, not internal/scaffold/fullsend-repo/. Scaffold file deletion itself is a separate future step (Step 8) not yet done, so the directory isn't gone, but it's no longer where agent-script fixes should land. This reverts the FULLSEND_VALIDATED_ITERATION_DIR selection logic (600df8d) and the fail-open fallback fix + tests (3aa1d71, f4355cd) from the five scaffolded post-scripts and their test files, restoring them to their pre-#5395 state. The underlying CLI-side fix (run.go's retry/validation loop, postScriptRepoEnv, and the FULLSEND_VALIDATED_ ITERATION_DIR env var the CLI sets for whatever post-script actually runs) is untouched — that's core CLI logic, not an agent script, and remains correct regardless of which repo hosts the script content. Tracked for the agents repo in fullsend-ai/agents#411 with a /fs-triage trigger to port the full feature there. Assisted-by: Claude Signed-off-by: Wayne Sun <gsun@redhat.com>
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…claim Review-squad follow-up found the comment (and cli-internals.md diagram) still claimed post-review.sh/post-triage.sh/post-retro.sh/post-prioritize.sh "rely on FULLSEND_VALIDATED_ITERATION_DIR" — true when written, but the scaffold-script revert (4165faf) removed that consumption. The CLI still sets the env var correctly; the scaffold-embedded scripts just don't read it yet. Correct both to say so and point at the tracked port (fullsend-ai/agents#411) instead of claiming it's already handled. Assisted-by: Claude Signed-off-by: Wayne Sun <gsun@redhat.com>
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Final gate: review-squad pass post-rebase (claude-coder, claude-researcher; grok-review-agent's pass did not complete and is excluded)
Re-reviewed after rebasing onto latest main (which picked up an unrelated os.RemoveAll → forceRemoveAll change, correctly carried through all 3 hostRepositoryDownloadDir call sites during conflict resolution) and after reverting the internal/scaffold/fullsend-repo/scripts/ changes (agent scripts now live in fullsend-ai/agents; tracked there as fullsend-ai/agents#411).
Both completed reviewers independently verified: build/vet/test clean, all 3 hostRepositoryDownloadDir cleanup call sites consistently use forceRemoveAll, repoExtractedOK/validatedIterNum state threading through the retry loop and post-script defer is correct, errSymlink sound, docs accurate. claude-researcher caught one real MEDIUM (a stale comment claiming the scaffold post-scripts still consume FULLSEND_VALIDATED_ITERATION_DIR after the revert removed that) — fixed in 4367a589. claude-coder flagged one already-documented, non-blocking MEDIUM (the post-fix.sh sweep-recovery limitation lacks a filed tracking issue, only a code-comment reference) — noted for follow-up, not blocking.
No CRITICAL or HIGH findings from either pass. codecov/patch (61.11%) remains the sole known gap, already accepted as out-of-scope sandbox-integration test investment in the prior approval round.
Approving.
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It needs more coverage |
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Re: the patch coverage gap (61.11%, target 80%) — dug into this, all 5 misses + 2 partials are in There's already a test for this ( if os.Getuid() == 0 {
t.Skip("root bypasses permission checks")
}GitHub Actions' Ubuntu runners run as root, so this test never actually executes in CI — the branches are real and tested locally as non-root, just structurally invisible to codecov here. Two ways to close this, and I'd like input on which to prioritize:
Which of these (or something else) would you rather see? Happy to open a follow-up PR either way — this is the same gap already accepted as out-of-scope for this PR, just flagging the concrete options now that the root cause is nailed down. |
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🤖 Finished Retro · ✅ Success · Started 1:18 PM UTC · Completed 1:37 PM UTC |
Retro: PR #5395 — defer validation until all retry iterations completeWorkflow: Issue #5393 (retro-agent-filed) → triage (5 min) → code agent (24 min) → review agent (20 min) → 6 human-driven fix/review cycles over 4 days → merge. Outcome: The code agent produced a working initial fix for the validation/retry race condition in ~24 min, but introduced a CRITICAL security regression by making Review agent severity misclassification (key finding)The review agent detected the SafeDownload fail-open pattern and posted an inline comment about it — but rated it LOW by citing "sanitizeDownload re-sanitization" as a mitigating factor. This mitigation claim was factually incorrect: Because the review agent approved (all findings rated LOW/MEDIUM), no fix agent was auto-dispatched. The entire 4-day, 6-iteration fix cycle was manually orchestrated via Rework trajectory12 commits total (1 code agent, 5 fix agent, 6 human). The fix iterations addressed:
Evidence for existing issues
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Summary
Fixes the validation/retry race condition where the harness post-script was skipped even when a retry iteration produced valid output. Also adds a proper
errSymlinkerror type to preventfmt.Sprintfpanics during cleanup error reporting.Related Issue
Closes #5393
Changes
os.RemoveAllandSafeDownloadfailures inside the retry loop are now warnings (not fatal returns) when avalidation_loopis configured. This prevents extraction failures from aborting the retry loop before subsequent iterations can produce valid output.errSymlinkerror type: Added tointernal/sandbox/sandbox.gowith a properError()method.sanitizeDownloadnow wraps symlink removal failures in this type, providing path and target context. This prevents the%!v(PANIC=Error method: errSymlink is not user-visible)panic observed in cleanup error formatting.Testing
go build ./internal/cli/ && go build ./internal/sandbox/compiles cleanlygo vetpasses on both packagesgo test -race ./internal/sandbox/...passes — includes newTestErrSymlink_ErrorMethodtestgo test -race -run 'TestValidation|TestPostLoopValidationSweep|TestSweepResult' ./internal/cli/...passes — coversTestPostLoopValidationSweep_LatestIterPasses,_EarlierIterPasses,_NonePass,_EarlierIterClearsRepoOK,_PassesEmptyTargetRepoDir,TestSweepResult_RepoExtractedOK_PreservesWhenRunCountscan-secretspasses on all changed filesCloses #5393
Post-script verification
agent/5393-defer-validation-after-retries)3cfa255ab4cc8190670585ea42da529119251632..HEAD)