Config Correctness

Injectable Skill: Config Correctness

L1 trigger: L1_PATTERN=true AND (config/ OR settings OR constants OR DEFAULT_ OR MAX_ OR MIN_ OR protocol docs/comments detected) Inject Into: depth-edge-case, depth-state-trace Language: Go and Rust Finding prefix: [CFG-N]

Purpose

Configuration bugs are often single-line semantic drift: a limit exists but is not used, a default is testnet-only but ships in production, a doc comment says one bound while code enforces another, or a feature flag changes protocol-visible enum values. This skill is a bounded enumeration pass, not a new agent.

1. Configuration Inventory

Build a table of security-relevant constants and runtime config fields:

Include:

• DEFAULT_*, MAX_*, MIN_*, *_LIMIT, *_TIMEOUT, *_INTERVAL, *_FACTOR;
• chain parameters, genesis/testnet/mainnet defaults, peer/network limits, RPC limits, difficulty/EMA/oracle knobs;
• feature-flag or platform-conditional values that affect serialization, consensus, object layout, or API output.

2. Required Checks

For each row:

• Doc/code drift: compare the declared value with nearby comments, docs, config examples, and protocol constants.
• Unused limit: if a max/min/factor exists, find the enforcement site. If no enforcement path exists, flag it.
• Network-mode drift: verify testnet/devnet defaults cannot silently apply to production mode.
• Unit drift: verify seconds vs milliseconds, bytes vs chunks, slots vs blocks, and percentage vs basis-point units.
• Feature/platform drift: verify feature flags or OS-specific types do not change externally visible enum values, byte layout, consensus fields, or API semantics.
• Boundary effect: substitute the configured min/max/equality point into the function that consumes it.

Tag evidence as [CFG-DOC-DRIFT:{file}:{line}], [CFG-UNUSED-LIMIT:{file}:{line}], [CFG-UNIT:{file}:{line}], or [CFG-FEATURE-DRIFT:{file}:{line}].

3. Non-Finding Rules

Do not report harmless style differences. A config finding needs at least one concrete consequence: consensus divergence, DoS, stale security bound, unexpected production exposure, cross-platform incompatibility, or user/API misbehavior.

3a. Secrets / Key-Management Hygiene

Node clients hold validator keys, JWT secrets, and operator credentials. A secret committed to the repo, weakly encrypted at rest, or surfaced through a deployment manifest is a direct compromise of every operator that follows the config.

Bounded reads: read SCIP graph artifacts (caller_map.md, callee_map.md, state_write_map.md, function_summary.md) to locate keystore-load and credential-read call-sites; on-demand single-symbol source reads for keystore/credential-handling functions only; never bulk-read large files (and never read the full content of a flagged key file — record its path, not its bytes).

Heuristics:

1. git grep -niE 'private_key|priv_key|secret_key|keystore|password|passphrase|mnemonic|seed_phrase|jwt(_|\.)?secret|api[_-]?key|BEGIN .*PRIVATE KEY' across the repo (config dirs, fixtures, docker/, k8s/, scripts/, CI files). Distinguish real material from test fixtures and placeholder env-var names; a plaintext key or real credential in tracked source is a finding regardless of directory.
2. Keystore encryption strength: locate keystore load/save. Verify keys at rest are encrypted with a vetted KDF (scrypt/argon2/pbkdf2 with sane params), not stored plaintext or under a weak/empty default password.
3. Deployment manifests: review Dockerfile, docker-compose*.yml, *.k8s.yaml/Helm values, systemd units, and CI workflow files for credentials in ENV/environment/args or baked into image layers. Secrets belong in a secret store / mounted file, not in image env or committed manifests.
4. Rotation/automation leakage: review any key-rotation or provisioning script for writing creds to world-readable paths, logging the secret, or transmitting it over an unauthenticated channel.

A secrets finding needs a concrete exposure path (tracked file, image layer, manifest, log, or transmission). Placeholder names and clearly-marked test keys are not findings.

Tag evidence as [CFG-SECRET-PLAINTEXT:{file}:{line}], [CFG-KEYSTORE-WEAK:{file}:{line}], or [CFG-MANIFEST-CRED:{file}:{line}].

4. Output

Use normal finding format. If no finding exists, still emit the inventory table with SAFE rows and concrete file:line evidence for the checked constants.