Re-ingested under schema v2 (populates error_snippets) and re-ran detect over
27 real sessions. Added a 'content-level root causes' section to
docs/ASSESSMENT-infra-friction.md: top recurring error is Edit/Write-before-Read
(12/27 sessions, 8 repos), then stale-read conflicts, a cross-flavor (claude+grok)
make fix-consistency failure, and State Hub MCP instability. Documented a
fingerprint-noise caveat. WP-0006 finished; suite 98/98.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
detect/signals.py sig_recurring_error emits one signal per distinct error
fingerprint per session (magnitude = in-session occurrences), so the same error
recurring across sessions/repos/flavors clusters into a candidate root-cause
problem pattern via the existing clusterer — cross-flavor flagged automatically.
3 new tests; suite 98/98 green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
build_digest now extracts normalized error fingerprints + samples from failed
events (error kind + failing tool_result bodies) into a durable error_snippets
list — paths/numbers/uuids/addrs stripped so the same error collapses to one
fingerprint with a count; Python traceback header skipped in favour of the real
exception line. Durable in Tier 2 (survives Tier 1 eviction). SCHEMA_VERSION ->
2 (re-ingest needed to populate). 7 new tests; suite 95/95 green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Captures normalized error fingerprints into the durable digest and clusters
recurring root-cause errors across sessions — closes the content-level 'why' gap
called out in the friction assessment. 3 tasks; we implement this in helix_forge.
(State Hub skill handed off to the state-hub worker as STATE-WP-0058.)
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
