Coverage Gap Audit findings D-005 (P0) + D-006 (P1) fixed together in a
single commit because they share the same root cause — policy CRUD sending
values the backend silently rejects — and splitting them would leave a
half-working UI between commits.
## D-005 (P0): PoliciesPage dropdown 400s every Create Policy
Root cause
----------
`web/src/pages/PoliciesPage.tsx` populated the Type `<select>` from a
hardcoded `['key_algorithm', 'ownership', 'allowed_issuers', ...]` array.
The backend's `internal/api/handler/validators.go::ValidatePolicyType`
enforces the TitleCase allowlist `AllowedIssuers`, `AllowedDomains`,
`RequiredMetadata`, `AllowedEnvironments`, `RenewalLeadTime` — defined in
`internal/domain/policy.go`. Every Create Policy request was rejected with
`400 invalid policy type`. The error surfaced only as a transient toast;
the modal closed anyway. Silent user-visible failure.
Fix
---
- `web/src/api/types.ts`: added `POLICY_TYPES` and `POLICY_SEVERITIES`
tuples with `as const` and narrowed `PolicyRule.type`, `.severity`, and
`PolicyViolation.severity` to the literal-union types. Dropdown is now
sourced from the tuple; casing drift becomes a compile error.
- `web/src/pages/PoliciesPage.tsx`: rekeyed `severityStyles` /
`severityDots` to the TitleCase values, added `humanize()` for display
(AllowedIssuers → "Allowed Issuers"), removed the `badge-neutral`
fallback that was papering over the mismatch.
- `web/src/api/types.test.ts` (new): pins both tuples exactly. If anyone
edits one side of the frontend/backend contract without the other, CI
fails with a clear assertion. Pure-TS vitest, no RTL dependency.
## D-006 (P1): `severity` field silently dropped on create/update
Root cause
----------
`PolicyRule` had no `Severity` field in `internal/domain/policy.go`. The
frontend has always sent `severity` on create/update, but Go's
`json.Decoder` (default settings, no `DisallowUnknownFields`) silently
dropped it. The value never reached PostgreSQL. Every rule rendered with
the same severity because there was no severity — just a display
computation downstream.
Fix: option (b), full-stack schema add (not delete-the-field)
-------------------------------------------------------------
- Migration `000013_policy_rule_severity` (up + down): adds
`severity VARCHAR(50) NOT NULL DEFAULT 'Warning'` to `policy_rules` with
CHECK constraint `severity IN ('Warning', 'Error', 'Critical')`. No
index — three-value column on a low-thousands-rows table, planner will
seq-scan regardless. PG 11+ metadata-only ADD COLUMN, safe on live data.
- `internal/domain/policy.go`: added `Severity PolicySeverity` field.
- `internal/repository/postgres/policy.go`: plumbed `severity` through
ListRules SELECT + Scan, GetRule SELECT + Scan, CreateRule INSERT,
UpdateRule UPDATE (4 queries).
- `internal/service/policy.go::UpdatePolicy`: if the client omits
severity on a PUT (zero-value empty string), fetch the existing rule
and preserve its severity. Without this, partial updates would trip the
NOT NULL CHECK and 500. Preserves pre-existing behavior for Name/Type
(out of scope).
- `internal/api/handler/policies.go::CreatePolicy`: default empty severity
to `'Warning'`, then validate via `ValidatePolicySeverity`. 400 with
clear message instead of 500 on CHECK violation. `UpdatePolicy`:
validates severity only when provided.
- `internal/mcp/types.go` + `internal/mcp/tools.go`: added optional
`severity` on the MCP `create_policy` / `update_policy` tool inputs so
LLM callers stay in sync with the wire contract.
- `api/openapi.yaml`: added `severity` to the `PolicyRule` schema with
the enum and default.
Acceptance criterion (user-defined)
-----------------------------------
"Create a rule with severity=Critical, reload the page, and still see
Critical — no silent drops." Verified end-to-end: frontend sends
`severity: "Critical"`, handler validates, service persists, DB stores,
GET returns, React renders the correct badge.
Seed data
---------
`migrations/seed.sql`: four demo rules now have differentiated severities
— `pr-require-owner` → Warning, `pr-allowed-environments` → Error,
`pr-max-certificate-lifetime` → Critical, `pr-min-renewal-window` →
Warning. The user called out that seeding all four at the same severity
makes the feature look decorative; differentiation demonstrates the
column carries real signal.
## Integration test fix (side effect of D-006)
`internal/integration/e2e_test.go::TestCrossResourceWorkflow/CreatePolicy`
was sending `"severity": "High"` — a value from the pre-audit severity
vocabulary that the new `ValidatePolicySeverity` correctly rejects with
400. Changed to `"Error"` (closest semantic match in the new TitleCase
allowlist). Only severity reference in the integration/ directory;
verified via grep.
## Out of scope, logged for follow-up (d/D-008)
Three policy-engine drift issues orthogonal to D-005 + D-006, explicitly
deferred per direction:
1. `migrations/seed.sql` policy_rules INSERTs use lowercase TYPE values
(`'ownership'`, `'environment'`, `'lifetime'`, `'renewal_window'`).
These are load-bearing on `internal/service/policy.go::evaluateRule`'s
`switch rule.Type` (which also uses the lowercase strings). Migrating
requires coordinated changes across seed + evaluation engine.
2. `migrations/seed_demo.sql:482-483` contains lowercase `'critical'`
severity — will now fail the new CHECK constraint. Separate fix.
3. `evaluateRule` hardcodes `Severity: domain.PolicySeverityWarning` on
emitted violations and ignores the configured `rule.Config`. The new
severity column is read correctly on the CRUD path but not yet
consulted during evaluation.
## Verification
Backend:
- `go build ./...` — clean
- `go vet ./...` — clean
- `go test -short ./...` — all packages green, including
`internal/service` (policy service), `internal/api/handler` (policy +
MCP handler tests), `internal/integration` (e2e_test.go after fix),
`internal/domain`, `internal/repository/postgres`.
Frontend:
- `tsc --noEmit` — clean
- `vitest run` — 223/223 passing (4 new assertions in types.test.ts)
- `vite build` — clean (only the pre-existing chunk-size warning)
Upgrade from Go 1.22 to 1.25 (minimum for MCP SDK, actively supported).
CI updated to match.
Codebase audit fixes:
- Local CA parseIP() now uses net.ParseIP — IP SANs no longer silently dropped
- Nil pointer guards in agent.go GetWorkWithTargets for target/cert enrichment
- MCP CreateCertificateInput marks owner_id/team_id as required
- NGINX connector uses CombinedOutput() — captures diagnostic output on failure
- Jobs handler validates JSON decode on rejection body — returns 400 on malformed
- CRL/OCSP handlers propagate requestID for error tracing
MCP server tests (26 tests):
- client_test.go: HTTP client coverage (GET/POST/PUT/DELETE, auth, 204, errors, binary)
- tools_test.go: tool registration, pagination, end-to-end flows with mock API
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Separate standalone binary (cmd/mcp-server/) using official MCP Go SDK
(modelcontextprotocol/go-sdk v1.4.1) with stdio transport. Stateless HTTP
proxy translates MCP tool calls to certctl REST API requests. 76 tools
across 16 resource domains with typed input structs and jsonschema tags
for automatic LLM-friendly schema generation.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
shankar0123