Verify Fix

---
name: verify-fix
description: 'Post-fix verification — re-scan the repo, gate on `--exploits weaponized --severity high`, recheck the specific CVE against the new installed version, write the verdict to `.vulnetix/memory.yaml`. Use when confirming a fix landed, validating a version bump did not introduce regressions, or producing a clean-scan attestation for compliance.'
license: Apache-2.0
allowed-tools: Bash(vulnetix:*) Read Grep Glob Bash(git:*)
argument-hint: <vuln-id>
user-invocable: true
model: sonnet
metadata:
  outputBudget: short
  cooldown: per-session
  chain: "vex-publish"
---
# Vulnetix Fix Verification Skill

## Use when

- You just applied a fix via `fix` and need PASS/FAIL confirmation.
- Validating a peer-dep upgrade chain did not introduce new vulnerabilities.
- Producing a clean-scan attestation for a compliance bundle.
- Pre-release: confirming all triaged P1/P2 items are resolved.
- Setting decision status from `under_investigation` to `fixed` with audit trail.

## Don't use for

- Initial scanning — use `vulnetix scan` or `repo-impact`.
- Applying the fix — use `fix` first.
- Multi-CVE upgrade verification — use `@dep-upgrade-orchestrator` agent.

## Conventions

Follows `skills/_lib/contract.md`. In short: use the `vulnetix_*` MCP tools when the agent has them and the CLI otherwise — both shape their own output, so there is no jq step any more. Independent calls go out as concurrent Bash tool calls in one message. One trailing suggestion, not a playbook. See the contract for surface selection, output style and memory writes.

Run after `fix` (or any manual remediation) to confirm the vulnerability is gone and no regressions appeared.

## Step 1: Load capabilities + memory

Read `.vulnetix/capabilities.yaml` and `.vulnetix/memory.yaml`. Find the entry for `$ARGUMENTS`. Capture: package, fixed_version, manifest path.

## Step 2: Pre-flight

```bash
# Ensure the manifest changed since last scan
git diff --name-only HEAD~5 -- "<manifest_path>" 2>/dev/null
```

If no recent change to the manifest, warn the user and proceed.

## Step 3: Run gated scan

```bash
vulnetix scan \
  --evaluate-sca \
  --severity high \
  --exploits weaponized \
  -o json
```

Capture exit code. Non-zero means a critical/high vuln with weaponized exploit signal still present.

## Step 4: Targeted recheck of the specific CVE

```bash
vulnetix vdb fixes "$ARGUMENTS" -o json
vulnetix vdb vuln "$ARGUMENTS" -o json
```

Cross-check: does the *new* installed version fall outside the affected range?

## Step 5: Render verdict

```
Fix verification: <PASS | FAIL>
Vuln: $ARGUMENTS
Package: <name>
Pre-fix version: <prev>
Post-fix version: <new>
Affected range: <range>
Within affected range now? <yes/no>
Scan gate (high+weaponized): <pass/fail>
Other regressions introduced: <count>  (list top 5 if any)
```

## Step 6: Update memory

- On PASS: set `status: fixed`, `decision.choice: fix-applied`, append `event: fix-verified`.
- On FAIL: keep `status: affected`, append `event: fix-verification-failed` with reason.

## Step 7: Follow-ups on FAIL

- Suggest `dep-resolve` if version bump is blocked by a transitive constraint.
- Suggest `safe-harbor-resolver` (agent) if multiple manifests conflict.

## Edge cases & gotchas

- The gated scan (`scan --exploits weaponized --severity high`) returns exit code 1 on findings — wrap with `|| true` if you want to capture without aborting the surrounding shell.
- Recheck calls `vdb fixes` and `vdb vuln`, or the `vulnetix_remediation` and `vulnetix_vuln` MCP tools. Both surfaces shape their own output, so a 2 MB advisory record arrives as the 10 KB a decision needs.
- `decision.choice: fix-applied` is one of 8 closed-enum values — never write arbitrary strings; the dashboard skill renders them under "Unknown".
- If the manifest was edited but the lockfile not regenerated (`npm install` was skipped), the scan reports the OLD vulnerability even though the manifest looks correct. Always run `<pm> install` before verify.
- Cross-check: the affected range in the vuln response should EXCLUDE the post-fix version. If both old and new versions are in the range, the bump did not reach a safe version.
- Memory write is single-consolidated at the end (with `--disable-memory` on inner CLI calls) — never run verify-fix concurrently from the same session.