Amey-Thakur SAST integration
Static analysis earns its place only when developers trust its output. A scanner that dumps 400 findings on every pull request gets muted inside a week, and it drags the three real bugs down with it. The problem is not running the tool; it is keeping the signal high enough that people keep reading it.
Method
- Match the scanner to the stack. Semgrep for polyglot and custom rules,
CodeQL for deep dataflow, Bandit for Python, gosec for Go, Snyk or
npm auditfor dependencies. Turn on the security ruleset, not the full style-and-lint pile that buries security findings in formatting noise. - Baseline the existing code first. Snapshot current findings and suppress them as a known baseline so the pipeline reports only what a change adds. A greenfield gate pointed at a legacy repo fails on day one and is switched off by day two.
- Set a noise budget and measure against it. Target well under one developer-facing finding per ten reviewed pull requests. If the false positive rate climbs past roughly 20 percent, tune or cut rules before adding any: track the number, do not eyeball it.
- Gate only on high-confidence, high-severity. Block on Critical and High at high confidence; render Medium and Low as inline annotations that do not stop the merge. A noisy blocking gate only trains people to hit the override.
- Make every suppression explicit and reviewed. Require an inline comment
with a reason (
// nosemgrep: reason) or a tracked exception, never a blanket config exclusion. Suppressions expire or get audited so they cannot silently harden into blind spots. - Scan diffs on every PR, the full repo on a schedule. Analyze only changed files per pull request for fast feedback; run the deep full-repo scan nightly or weekly and route those results to a backlog, not the blocking gate.
- Deliver findings where they get fixed. Post them as annotations on the exact line in the pull request, not to a dashboard nobody opens, and feed dependency alerts into the same triage flow.
Signals
- What fraction of the last 50 findings were acted on rather than dismissed?
- Does a clean pull request ever get blocked by an unrelated legacy finding?
- Can a developer see, and defend, every suppression in the file they touched?
Boundaries
SAST catches pattern-matchable bugs and misses the business-logic and authorization flaws that need security-code-review. Which individual rules to enable is per-repo tuning; this skill fixes the budget and the gating policy, not the rule list.