verify-existence
Tri-state existence check for a gap ID, Rust symbol, endpoint, script, or any artifact name. Returns "confirmed_shipped" (multiple positive signals), "confirmed_absent" (no signals), or "ambiguous" (single signal — investigate manually). Use BEFORE filing any "feature X is missing" gap to avoid the misdiagnosis class precedented by INFRA-1575 and INFRA-238 (claimed 10 A2A gaps missing when all had shipped; claimed origin/main reverted without git fetch). Thin wrapper over harness-neutral CLI at `scripts/dev/verify-existence.sh` (INFRA-1589). Supports `--json` for structured output. Per `.claude/README.md` pattern.
Install
npx skillscat add repairman29/chump/claude-skills-verify-existence Install via the SkillsCat registry.
/verify-existence — Tri-State Existence Check
Canonical surface: `scripts/dev/verify-existence.sh` (INFRA-1589). Any harness invokes the same script.
When to invoke this skill
Before filing ANY gap claiming "feature X is missing / broken / unfiled." chump gap show <ID> returns "not found" both for typos AND for gaps that shipped and were reaped — the silence is ambiguous. This skill resolves the ambiguity.
This is the guard documented in `AGENTS.md` "Runtime verification before missing-claim" — INFRA-1575 (10 A2A gaps misdiagnosed as missing) and INFRA-238 (origin/main "reverted" without verification) are the cautionary precedents.
Routing
Arguments passed: $ARGUMENTS — accept either a single token (gap ID, symbol, endpoint, script name) or --json <token>.
scripts/dev/verify-existence.sh $ARGUMENTSExit code is the answer — surface it
| Exit | Meaning | What to do |
|---|---|---|
| 0 | confirmed_shipped — multiple positive signals across checks |
DO NOT file a "missing" gap. Search git log for the implementing PR if context is needed. |
| 1 | confirmed_absent — no signal in any check |
File the gap. (You verified — this is real.) |
| 2 | ambiguous — exactly one positive signal |
Investigate manually before filing. Look at the specific signal that fired. |
Examples (pass any of these to the skill)
INFRA-1296 # shipped gap (reaped from active registry)
build_provider # Rust symbol
/api/broadcast # endpoint
broadcast.sh # scriptWhen NOT to use this
- For "is this gap currently in the open queue?" — use
chump gap show <ID>(the simple lookup is enough) - For PR state — use
gh pr view <N>or the cache helpers (cache_lookup_pr) - For arbitrary string search — use
grep -rndirectly; this skill is for structured existence claims, not exploration
Categories
Install
npx skillscat add repairman29/chump/claude-skills-verify-existence Install via the SkillsCat registry.
Repository Stars
The star count shown is for the parent repository (repairman29/chump), not this specific skill.
.claude/skills/verify-existence