trw-mcp 0.37.0

Engineering memory MCP server for Claude Code — patterns, gotchas, and project knowledge that persist across sessions

trw-mcp

MCP server for AI coding agents — persistent engineering memory, knowledge compounding, and spec-driven development workflows. Part of TRW Framework.

Every AI coding tool resets to zero. TRW is the one that doesn't.

Part of TRW Framework

trw-mcp is the MCP server component of TRW (The Real Work) — a methodology layer for AI-assisted development that turns each coding session's discoveries into permanent institutional knowledge. It works alongside trw-memory, the standalone memory engine.

• trw-mcp (this repo): MCP server with 24 tools, 24 skills, 18 agents
• trw-memory: Standalone memory engine with hybrid retrieval, scoring, and lifecycle

What It Does

trw-mcp is a Model Context Protocol server that gives AI coding agents persistent engineering memory. It records what you learn during development sessions — patterns, gotchas, architecture decisions — and recalls relevant knowledge at the start of every new session. Over time, your AI coding assistant accumulates project-specific expertise instead of starting from scratch every time.

The server also manages structured run tracking (phases, checkpoints, events), build verification (pytest + mypy), spec-driven development with AARE-F PRDs, and CLAUDE.md auto-generation from high-impact learnings.

Knowledge compounding in practice: 225 PRDs, 64+ sprints, 8,000+ tests, 91% coverage (trw-memory). The dogfooding is the proof — this codebase was built by AI agents using TRW.

Quick Start

See the full quickstart guide for Claude Code, Cursor, opencode, and Codex setup.

# Install from PyPI
pip install trw-mcp

# Or install from source
git clone https://github.com/wallter/trw-mcp.git
cd trw-mcp
python -m venv .venv && source .venv/bin/activate
pip install -e ".[dev]"

# Deploy TRW to a project (must be a git repo)
trw-mcp init-project /path/to/your/repo

# Or add the MCP server to Claude Code manually
claude mcp add trw -- trw-mcp --debug

Deploy to a Project

trw-mcp init-project bootstraps the full TRW framework in any git repository. Full configuration reference at trwframework.com/docs/configuration.

trw-mcp init-project .              # current directory
trw-mcp init-project /path/to/repo  # specific project
trw-mcp init-project . --ide codex  # force Codex bootstrap
trw-mcp init-project . --force      # overwrite existing files

This creates:

• .trw/ — learning memory, run state, configuration
• .mcp.json — MCP server connection for Claude Code
• CLAUDE.md — project instructions with TRW ceremony protocol
• .claude/hooks/ — ceremony enforcement hooks
• .claude/skills/ — workflow automation skills
• .claude/agents/ — specialized sub-agents

Configuration

Settings via environment variables (prefix TRW_) or .trw/config.yaml. Full reference at trwframework.com/docs/configuration.

# .trw/config.yaml — top settings (all optional, shown with defaults)
embeddings_enabled: false          # Enable vector search (requires [vectors] extra)
learning_max_entries: 5000         # Max learnings before auto-pruning
build_check_enabled: true          # Run pytest+mypy on trw_build_check
observation_masking: true          # Reduce verbosity in long sessions
progressive_disclosure: false      # Show tools progressively
ceremony_mode: "full"              # "full", "light", or "off"

MCP Tools (24)

24 tools covering the full AI coding assistant memory lifecycle. See tool reference docs for detailed parameter documentation.

Category	Tools	Purpose
Session	session_start, init, status, checkpoint, pre_compact_checkpoint, progressive_expand	Run lifecycle and progress tracking
Learning	learn, learn_update, recall, knowledge_sync, claude_md_sync	Knowledge capture and retrieval
Quality	build_check, review, trust_level, quality_dashboard, deliver	Verification and delivery
Requirements	prd_create, prd_validate	Spec-driven development with AARE-F PRDs
Ceremony	ceremony_status, ceremony_approve, ceremony_revert	Workflow compliance
Reporting	run_report, analytics_report, usage_report	Metrics and cost tracking

Skills (24)

Slash-command workflows — zero tokens until triggered. Full skill reference at trwframework.com/docs.

Sprint & Delivery: /trw-sprint-init · /trw-deliver · /trw-commit

Requirements: /trw-prd-new · /trw-prd-ready · /trw-prd-groom · /trw-prd-review · /trw-exec-plan

Quality: /trw-audit · /trw-review-pr · /trw-simplify · /trw-dry-check · /trw-security-check · /trw-test-strategy

Framework: /trw-framework-check · /trw-project-health · /trw-memory-audit · /trw-memory-optimize

Agents (18)

Specialized sub-agents for Agent Teams — parallel execution with coordinated handoffs:

Role	Agent	Purpose
Core Team	trw-lead, trw-implementer, trw-tester, trw-researcher, trw-reviewer, trw-adversarial-auditor	Orchestration, TDD, testing, research, review, spec-vs-code audit
Requirements	trw-prd-groomer, trw-requirement-writer, trw-requirement-reviewer	PRD lifecycle specialists
Quality	trw-traceability-checker, trw-code-simplifier	Traceability and code health

The 6-Phase Model

TRW implements a structured execution lifecycle: RESEARCH → PLAN → IMPLEMENT → VALIDATE → REVIEW → DELIVER with phase gates, build checks, adversarial audits, and delivery ceremony. See FRAMEWORK.md for the full specification, or read the framework overview at trwframework.com/docs/framework.

Configuration

Settings via environment variables (prefix TRW_) or .trw/config.yaml. Full configuration reference at trwframework.com/docs/configuration.

Variable	Default	Description
TRW_DEBUG	false	Enable debug logging to .trw/logs/
TRW_TELEMETRY_ENABLED	true	Tool invocation events (kill switch)
TRW_SOURCE_PACKAGE_NAME	auto	Python package name for --cov=
TRW_LLM_ENABLED	true	Allow LLM calls via anthropic SDK
TRW_LEARNING_PROMOTION_IMPACT	0.7	Min impact for CLAUDE.md promotion
TRW_OBSERVATION_MASKING	true	Reduce verbosity in long sessions

Development

# Install dev dependencies
pip install -e ".[dev]"

# Run tests
pytest tests/ -v --cov=trw_mcp --cov-report=term-missing

# Type checking (strict mode)
mypy --strict src/trw_mcp/

# Targeted testing during development
pytest tests/test_tools_learning.py -k "test_recall" -v

Architecture

src/trw_mcp/
  server/             # FastMCP entry point, middleware chain
  bootstrap.py        # init-project: deploy TRW to target repos
  models/             # Pydantic v2 models (config, run, learning, etc.)
  tools/              # MCP tool implementations
  state/              # State management (persistence, validation, analytics)
  middleware/         # FastMCP middleware (ceremony, observation masking, response optimizer)
  telemetry/          # Telemetry pipeline (models, sender, anonymizer)
  data/               # Bundled hooks, skills, agents for init-project

Troubleshooting

MCP connection error: "[Errno 2] No such file or directory" The MCP server process crashed. In Claude Code, type /mcp to reconnect. For other clients, restart your CLI tool.

trw_session_start() returns "No learnings found" This is normal on first use — learnings accumulate as you work. Call trw_learn() to save discoveries, then trw_deliver() to persist them.

stale .trw/ state after upgrading Run trw-mcp update-project . to migrate your project state to the latest schema. If issues persist, backup and re-initialize with trw-mcp init-project . --force.

Embeddings not working despite embeddings_enabled=true Embeddings require the [vectors] extra: pip install 'trw-mcp[vectors]'. Without it, vector search silently degrades to keyword-only.

Debugging

Enable debug logging:

trw-mcp --debug serve              # Debug mode with file logging
TRW_LOG_LEVEL=DEBUG trw-mcp serve  # Via environment variable

Logs are written to .trw/logs/trw-mcp-YYYY-MM-DD.jsonl.

License

Business Source License 1.1 — source-available, free for non-competing use. Converts to Apache 2.0 on 2030-03-21. See the full license terms.

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Built by Tyler Wall · TRW Framework · Documentation · License