speclock
SpecLock is an AI constraint/policy enforcement system for coding agents. It defines text and typed constraints (locks), reviews intended changes (including diff-based review), blocks or warns on violations via a hard/enforcement mode, and provides auditing (HMAC chain) plus encryption and RBAC for enterprise use. It also exposes MCP tooling and a REST API for automated review/checking, with a Python SDK and ROS2 integration described.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
The provided content claims AES-256-GCM encryption, PBKDF2 key derivation, HMAC-SHA256 chained audit logs, and RBAC with API keys. However, the excerpt does not provide verifiable implementation details (e.g., where secrets are stored/logged, key management boundaries, TLS requirements, or whether API keys are rotated/expiring). Rate-limit and error semantics are not specified, which can indirectly affect security posture (e.g., brute force/abuse handling).
⚡ Reliability
Best When
You run AI-assisted or autonomous code changes and need consistent cross-session enforcement of rules (especially for sensitive modules like auth/payments/data) with review and audit trails.
Avoid When
You cannot integrate the enforcement layer into your agents’ toolchain, or you need a well-defined OpenAPI spec/SDK docs with concrete, verifiable error/rate-limit semantics.
Use Cases
- • Prevent AI coding agents from modifying locked areas (e.g., auth, payments, regulated data)
- • Guardrails for autonomous code changes across sessions/tools/teams using policy-as-code
- • Diff-based patch review to detect destructive schema/interface changes
- • Blast-radius and lock-to-file mapping for informed approvals
- • Runtime/telemetry/ROS2 constraint enforcement for robots/autonomous systems
- • Auditability for compliance-oriented change control
Not For
- • General-purpose policy enforcement where formal, provable guarantees are required without model/semantic uncertainty
- • Environments where there is no ability to integrate the MCP server/REST endpoints into the agent workflow
- • Use cases requiring strict SLA-backed uptime guarantees (SLA not evidenced in provided content)
Interface
Authentication
Documentation describes API key creation with roles; it does not describe OAuth/SSO flows in the provided content and does not clearly specify fine-grained scopes beyond roles.
Pricing
Provided content emphasizes free & open source and mentions LLM usage for compilation; no concrete hosted pricing tiers or limits are evidenced in the excerpt.
Agent Metadata
Known Gotchas
- ⚠ Enforcement mode (hard vs advisory) must be correctly enabled; otherwise the agent may only receive warnings.
- ⚠ Semantic classification and diff review may block even when intent seems safe; agents should be prepared to use override/approval flows.
- ⚠ Patch gateway review requires supplying accurate file lists and (for review-diff) diffs; missing/incorrect inputs may change verdict quality.
- ⚠ Audit chain/encryption/auth features imply configuration requirements (e.g., encryption key) that an agent setup step must handle.
Alternatives
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Scores are editorial opinions as of 2026-03-30.