grace-explainer

GRACE — Graph-RAG Anchored Code Engineering

GRACE is a methodology for AI-driven code generation that makes codebases navigable by LLMs. It solves the core problem of AI coding assistants: they generate code but can't reliably navigate, maintain, or evolve it across sessions.

The Problem GRACE Solves

LLMs lose context between sessions. Without structure:

• They don't know what modules exist or how they connect
• They generate code that duplicates or contradicts existing code
• They can't trace bugs through the codebase
• They drift from the original architecture over time

GRACE provides four interlocking systems that fix this:

Knowledge Graph (docs/knowledge-graph.xml)
    maps modules, dependencies, and public module interfaces
Module Contracts (MODULE_CONTRACT in each file)
    defines WHAT each module does
Semantic Markup (START_BLOCK / END_BLOCK in code)
    makes code navigable at ~500 token granularity
Verification Plan (docs/verification-plan.xml)
    defines HOW correctness, traces, and logs are proven
Operational Packets (docs/operational-packets.xml)
    standardizes execution packets, deltas, and failure handoff

Six Core Principles

1. Never Write Code Without a Contract

Before generating any module, create its MODULE_CONTRACT with PURPOSE, SCOPE, INPUTS, OUTPUTS. The contract is the source of truth — code implements the contract, not the other way around.

2. Semantic Markup Is Not Comments

Markers like // START_BLOCK_NAME and // END_BLOCK_NAME are navigation anchors, not documentation. They serve as attention anchors for LLM context management and retrieval points for RAG systems.

3. Knowledge Graph Is Always Current

docs/knowledge-graph.xml is the single map of the entire project. When you add a module — add it to the graph. When you add a dependency — add a CrossLink. The graph never drifts from reality. Shared docs should describe the module's public contract, not every private helper or implementation detail.

4. Top-Down Synthesis

Code generation follows a strict pipeline:

Requirements -> Technology -> Development Plan -> Verification Plan -> Module Contracts -> Code + Tests

Never jump to code. If requirements are unclear — stop and clarify.

5. Verification Is Architecture

Testing, traces, and log markers are not cleanup work. They are part of the architectural blueprint. If another agent cannot verify or debug a module from the evidence left behind, the module is not fully done.

6. Governed Autonomy (PCAM)

• Purpose: defined by the contract (WHAT to build)
• Constraints: defined by the development plan (BOUNDARIES)
• Autonomy: you choose HOW to implement
• Metrics: the contract plus verification evidence tell you if you're done

You have freedom in HOW, not in WHAT. If a contract seems wrong — propose a change, don't silently deviate.

How the Elements Connect

docs/requirements.xml          — WHAT the user needs (use cases, AAG notation)
        |
docs/technology.xml            — WHAT tools we use (runtime, language, versions)
        |
docs/development-plan.xml      — HOW we structure it (modules, phases, public contracts)
        |
docs/verification-plan.xml     — HOW we prove it works (tests, traces, log markers)
docs/operational-packets.xml   — HOW agents hand work across execution, review, and fixes
        |
docs/knowledge-graph.xml       — MAP of module boundaries, dependencies, public interfaces, and verification refs
        |
src/**/* + tests/**/*          — CODE and TESTS with GRACE markup and evidence hooks

Each layer feeds the next. The knowledge graph and verification plan are both outputs of planning and inputs for execution.

Important boundary rule:

• shared GRACE docs describe only public module contracts and public module interfaces
• private helpers, local-only types, and internal orchestration details stay in the module file header, function contracts, and semantic blocks

Optional CLI Support

GRACE also has an optional CLI package, @osovv/grace-cli, which installs the grace binary.

Current public commands:

• grace lint --path /path/to/project
• grace module find auth --path /path/to/project
• grace module show M-AUTH --path /path/to/project --with verification
• grace file show src/auth/index.ts --path /path/to/project --contracts --blocks

Use the CLI for:

• GRACE semantic markup pairing and completeness
• unique-tag convention anti-patterns in XML
• graph/plan/verification reference mismatches
• MODULE_MAP vs export drift in supported source files
• resolving module IDs from names, paths, dependencies, and verification refs
• reading shared/public module context from the XML artifacts
• reading file-local/private implementation context from governed source files

Public/private split:

• grace module show is the shared/public view of a module from plan, graph, steps, and verification
• grace file show is the file-local/private view from MODULE_CONTRACT, MODULE_MAP, CHANGE_SUMMARY, scoped contracts, and semantic blocks
• grace module find searches both planes, including LINKS from file-local markup

The CLI does not replace $grace-reviewer, $grace-refresh, or $grace-verification. It is a cheap automated guardrail before or alongside those higher-context workflows.

Development Workflow

1. $grace-init — create docs/ structure and AGENTS.md
2. Fill in requirements.xml with use cases
3. Fill in technology.xml with stack decisions
4. $grace-plan — architect modules, data flows, and verification refs
5. $grace-verification — design and maintain tests, traces, and log-driven evidence
6. $grace-execute — generate all modules sequentially with review and commits
7. $grace-multiagent-execute — generate parallel-safe modules in controller-managed waves
8. $grace-refactor — rename, move, split, merge, or extract modules without drift
9. $grace-refresh — sync graph and verification refs after manual changes
10. $grace-fix error-description — debug via semantic navigation
11. $grace-status — health report
12. $grace-ask — grounded Q&A over the project artifacts

Detailed References

For in-depth documentation on each GRACE component, see the reference files in this skill's references/ directory:

• references/semantic-markup.md — Block conventions, granularity rules, logging
• references/knowledge-graph.md — Graph structure, module types, CrossLinks, maintenance
• references/contract-driven-dev.md — MODULE_CONTRACT, function contracts, PCAM
• references/verification-driven-dev.md — Verification plans, test design, traces, and log-driven development
• references/unique-tag-convention.md — Unique ID-based XML tags, why they work, full naming table