reassess-roadmap artifact check fails despite file existing on disk and committed

[jkristoph]

Bug Report

GSD version: 0.57.1 (@glittercowboy/gsd)

What happened

reassess-roadmap M016/S01 dispatched by auto-mode after slice completion. Agent writes S01-ASSESSMENT.md, auto-commit succeeds, working tree is clean — but the dispatcher's artifact check reports "Expected artifact not found" and re-dispatches. Loops 4 times before hitting the loop detector.

Evidence

• File exists on disk: ls -la confirms 1347 bytes at .gsd/milestones/M016/slices/S01/S01-ASSESSMENT.md
• git status shows clean working tree
• git log shows 4 successive chore(M016/S01): auto-commit after reassess-roadmap commits, each modifying the same file
• No gsd/* branch exists — commits land on master (the integration branch)
• STATE.md already advanced to S02 executing

Error message

Error: Loop detected: reassess-roadmap M016/S01 dispatched 4 times total.
Expected artifact not found.
    Expected: .gsd/milestones/M016/slices/S01/S01-ASSESSMENT.md (roadmap reassessment)
    Check branch state and .gsd/ artifacts.

Possible causes

• Artifact check may be looking on a different branch than the one the auto-commit lands on
• Check may run before the auto-commit flushes to disk
• Stale filesystem state between dispatch cycles

Reproduction

1. Complete a slice in auto-mode (e.g. S01 of a multi-slice milestone)
2. Auto-mode dispatches reassess-roadmap M016/S01
3. Agent writes S01-ASSESSMENT.md and it gets auto-committed
4. Dispatcher reports artifact not found and re-dispatches
5. Loops until loop detector kills it