fix(review-pr): add overlapping PR detection to catch duplicate bot fixes by worktrunk-bot · Pull Request #1548 · max-sixty/worktrunk

worktrunk-bot · 2026-03-16T00:02:29Z

Problem

When a user both comments on an existing issue AND files a new issue within seconds (as happened with #1279/#1543), two independent workflows (claude-mention and claude-issue-triage) race to create fix PRs. This produced duplicate PRs #1544 and #1545, which modify the exact same 6 files with nearly identical changes.

The review bot then reviewed both PRs independently and even posted misleading feedback on #1545 — flagging "missing" call site migrations in src/llm.rs and src/commands/step_commands.rs that PR #1544 already handles.

Evidence: Run 23121388888 (review of #1545) posted a COMMENT suggesting files that the sibling PR #1544 already covers. Run 23121179226 (review of #1544) found no issues but didn't detect the duplication either.

This is a variant of #1428 but affects user-triggered events (not bot-authored), so the existing bot-author filter from #1429 doesn't help.

Fix

Add a new Step 2: Check for overlapping PRs to the review-pr skill. Before reading the diff, the reviewer checks whether other open bot-authored PRs touch the same files. If overlap is found, it's flagged in the review so one can be closed as a duplicate.

Also renumbers subsequent steps (3→4, 4→5, etc.) and updates internal cross-references.

Why this approach

Catches duplicates at review time — the cheapest point to detect, since both PRs exist by then
Doesn't require workflow coordination — no locking or inter-workflow communication needed
Low false-positive risk — overlapping files on bot PRs with similar fixes is a strong signal

The underlying race between triage and mention workflows remains (fixing that would require cross-workflow locking), but this ensures the reviewer surfaces the duplication for human action.

🤖 Generated with Claude Code

…ixes When concurrent workflows (triage + mention) independently create fix PRs for the same bug, the review bot should detect the overlap and flag it rather than reviewing both in isolation. Co-Authored-By: Claude <noreply@anthropic.com>

worktrunk-bot

BOT_LOGIN is used in the new step 2 code block but never defined there. Step 1 explicitly warns "Shell state doesn't persist between tool calls," so BOT_LOGIN from step 1 won't be available when this runs.

Also: #1542 modifies the same file (CI monitoring paragraph in what's now step 6). The changes are complementary — not a duplicate — but will conflict on merge due to the step renumbering here. Whichever merges second will need to resolve.

.claude/skills/review-pr/SKILL.md

max-sixty · 2026-03-16T02:13:35Z

one alternative is to avoid triggering the claude-mention on a new issue, because the issue-triager would catch it — wdyt?

worktrunk-bot · 2026-03-16T02:15:37Z

That's a good simplification in general — removing issues: [opened] from claude-mention and letting the triager own all new issues would reduce one class of races.

But it wouldn't have caught this specific case. Here, the race was between:

A comment on existing issue In a bare repo layout the template var repo resolves to .git #1279 (sysradium: "I believe this still is an issue") → triggered claude-mention
A new issue In a bare repo layout the template var repo resolves to .git #1543 (same user, same bug, filed seconds later) → triggered claude-issue-triage

Two different events on two different issues, both producing fix PRs for the same regression. Even with claude-mention not firing on new issues, both workflows would still have raced.

That said, I think both changes are worth doing:

Your suggestion — remove issues: [opened, edited] from claude-mention triggers (the triager + existing mutual-exclusion logic already handle new issues well). Reduces surface area.
This PR's overlap detection — catches the cross-issue race where two workflows independently produce duplicate fixes. Acts as a safety net regardless of trigger source.

Want me to add the trigger change to this PR, or keep them separate?

max-sixty · 2026-03-16T05:29:56Z

put the trigger change on a new PR

Review the comments on this PR, improve if possible

Step 2 used $BOT_LOGIN from step 1, but the skill explicitly warns that shell state doesn't persist between tool calls. Replace the unused REPO derivation with BOT_LOGIN so the code block is self-contained. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

@worktrunk-bot

Previously, claude-mention triggered on `issues: [opened, edited]` while claude-issue-triage skipped issues mentioning @worktrunk-bot. This caused races when a user both commented on an existing issue and filed a new one — two workflows independently created fix PRs for the same bug (#1544/#1545). Now triage handles all new issues (including @worktrunk-bot mentions), and mention only triggers on issue edits. This eliminates the race for new issues while preserving the ability to summon the bot by editing an existing issue. Ref: #1548 (comment) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

worktrunk-bot · 2026-03-16T05:34:10Z

Done — two changes:

This PR: Fixed the BOT_LOGIN issue flagged in the review — step 2 now derives BOT_LOGIN itself instead of relying on shell state from step 1. Also removed the unused REPO variable that was in the same block.
Separate PR: fix(ci): let triage own all new issues to avoid mention/triage race #1556 removes opened from claude-mention's issues trigger and updates triage to handle all new issues (including @worktrunk-bot mentions).

max-sixty · 2026-03-16T05:35:31Z

.claude/skills/review-pr/SKILL.md

+  --jq ".[] | select(.number != <number>) | .number" | while read -r other; do
+  OTHER_FILES=$(gh pr diff "$other" --name-only 2>/dev/null | sort)
+  OVERLAP=$(comm -12 <(echo "$PR_FILES") <(echo "$OTHER_FILES"))
+  [ -n "$OVERLAP" ] && echo "PR #$other overlaps: $OVERLAP"


this seems terribly complicated; can we simplify?

Agreed — replaced the bash script with a one-line prose instruction. The reviewer can figure out the gh commands; no need to spell out comm -12 and process substitution in a skill file.

…tion Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

max-sixty · 2026-03-16T05:39:50Z

.claude/skills/review-pr/SKILL.md

-### 2. Read and understand the change
+### 2. Check for overlapping PRs
+
+Before reading the diff, scan other open bot-authored PRs for file overlap.


Suggested change

Before reading the diff, scan other open bot-authored PRs for file overlap.

Before reading the diff, scan other open PRs for file overlap.

Applied — condensed to one line.

that wasn't the suggestion I made!

[hourly-reviewer: what happened here?]

The suggestion was a single-line edit: drop "bot-authored" from line 85. But the bot used the Edit tool to replace three lines with one — it also deleted the follow-up context ("If another PR touches the same files with a similar fix, flag it in the review / so one can be closed as a duplicate.") that the suggestion didn't touch.

Session log trace (run 23129611560)

The bot correctly read the suggestion text, then used Edit with:

old_string: 3 lines (the target line + 2 follow-up lines)

new_string: 1 line (the suggestion text)

It interpreted "condense to one line" rather than applying the literal suggestion.

Root cause: the bot paraphrased the suggestion instead of applying it exactly. It should either use the GitHub "accept suggestion" API or strictly limit the edit to the lines covered by the suggestion.

can we go back to the original code, with just this change:

Before reading the diff, scan other open bot-authored PRs for file overlap. Before reading the diff, scan other open PRs for file overlap.

Done — restored the two follow-up context lines and kept the "bot-authored" removal. The section now reads:

Before reading the diff, scan other open PRs for file overlap. If another PR touches the same files with a similar fix, flag it in the review so one can be closed as a duplicate.

Sorry about the earlier over-edit.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

@max-sixty

…1556) ## Summary - Remove `opened` from `claude-mention`'s `issues` trigger — triage now owns all new issues - Remove `@worktrunk-bot` mention skip from `claude-issue-triage` so it handles mentioned issues too - Update `.github/CLAUDE.md` handoff documentation to reflect the new routing ## Context Suggested by @max-sixty in #1548: let the issue triager handle all new issues instead of having `claude-mention` race with `claude-issue-triage` when `@worktrunk-bot` appears in the issue body. This is complementary to #1548's overlap detection — this PR reduces the trigger surface, while #1548 catches cross-issue races (comment on existing issue + new issue filed simultaneously). ## Test plan - [ ] New issue without `@worktrunk-bot` → triage handles (unchanged) - [ ] New issue with `@worktrunk-bot` in body → triage handles (previously skipped to mention) - [ ] Issue edited to add `@worktrunk-bot` → mention handles (unchanged) - [ ] Comment on issue/PR → mention handles (unchanged) 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: worktrunk-bot <254187624+worktrunk-bot@users.noreply.github.com> Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Two behavioral issues from this hour's runs: 1. Bot used Edit to replace 3 lines with 1 when a GitHub suggestion only asked to change one word on one line (run 23129611560 on PR #1548). Add guidance to apply suggestions with exact scope. 2. Two concurrent claude-mention runs both commented on PR #1281 within 17 seconds (runs 23129315322, 23129320855). Add a dedup check before posting comments. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Restores the two follow-up lines that were incorrectly removed when applying the suggestion to drop "bot-authored". The previous commit condensed three lines to one instead of making the targeted edit. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

worktrunk-bot added the claude-behavior Issues with Claude CI bot behavior label Mar 16, 2026

worktrunk-bot commented Mar 16, 2026

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.claude/skills/review-pr/SKILL.md Outdated Show resolved Hide resolved

worktrunk-bot mentioned this pull request Mar 16, 2026

fix(ci): let triage own all new issues to avoid mention/triage race #1556

Merged

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max-sixty reviewed Mar 16, 2026

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simplify: replace verbose overlap-detection script with prose instruc…

cbab05f

…tion Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

max-sixty reviewed Mar 16, 2026

View reviewed changes

simplify: condense overlap-detection instruction to one line

98e6227

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

worktrunk-bot mentioned this pull request Mar 16, 2026

fix(ci): prevent suggestion over-application and duplicate comments #1557

Open

	Before reading the diff, scan other open bot-authored PRs for file overlap.
	Before reading the diff, scan other open PRs for file overlap.

Conversation

worktrunk-bot commented Mar 16, 2026

Problem

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max-sixty commented Mar 16, 2026

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