fail

impeccable

It missed 3 of 10 requests it should have handled — the skill stayed silent and the model answered on its own.

2026-09-08claude-haiku-4-5-202510012 attempts per caseclaude-coderun-2026-09-08T10-15-55-401Z-c4c1faa3

Fired when it should have

fired in 7 of 10 attempts

70%

95% confidence between 40% and 89%. 10 attempts leave this very unsettled — run more to narrow it.

Was right when it fired

was right in 7 of 7 attempts

100%

95% confidence between 65% and 100%. 7 attempts narrow it this far; more would narrow it further.

Every case

Instability

1 case produced both outcomes

The same prompt, the same model, different results. A single run of any of these would have been a coin flip reported as a fact.
  • trigger.positive.empty_state — 1 passed, 1 failed

Conditions

Two runs are comparable only when all of these are identical. A score that moved because the model changed is not a regression in the skill.

Skill version
pbakaus/impeccable@831cabee8b4bc1a2b66e5ae22003e9a19b57d464
Skill hash
sha256:5c5260774d0095b797526ecb6f43b01000caf5b70346d07bb89168dcd148cdcb
Model
claude-haiku-4-5-20251001
System prompt hash
not-provided-by-host
Environment hash
sha256:3abcf17d1ef9845506852d41cfa86d509e4cd02c6d7347a69ca58456e672a2d7
Permission mode
acceptEdits
Host memory
not measured (the record predates 0.4.5 or the probe did not run)
Context hash
not measured (the record predates 0.4.5 or the probe did not run)
Case set version
1
Case set hash
sha256:c820aafc5cc50f635fb7c46b864eb8ed1642b67bfea9daac2e634c8581a33545
Assay version
0.3.1 or earlier (the record predates version stamping)

Recorded before the host CLAUDE.md leak was closed (Assay 0.4.5). This run’s working directory sat under the measuring machine’s home directory, and Claude Code loads instruction files from every directory above the one it works in, so that machine’s ~/.claude/CLAUDE.md — a single instruction about an unrelated tool, graphify — would have entered the context. Which instruction files actually entered it was not measured.

The name graphify appears in none of this run’s 24 attempts. No trace does not prove no effect.

Not re-measured: no Skill call in any published run targets graphify, and the one finding the file could plausibly affect — the marketing-skills positioning case, 10 of 10 attempts — was reproduced without it, 8 of 10.

No earlier run was measured under the same conditions. See what changed since the previous run

What it cost

Attempts
24
Tokens in / out
1,591 / 78,074
Cost
$1.64
Agent time
21 min

Combined trigger score (F1) 0.82 · 21 of 24 trigger decisions were correct.