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DocForge2/docs/CONTRACT.md

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# DocForge 0.1 contract
## Authority boundary
DocForge is bound to one explicit project root. Canonical project files own documentation facts.
Indexes, query results, context packs, changesets, previews, and renders are derived artifacts.
The generic core may validate and retrieve canonical nodes. A future proposal service may write only
isolated changesets. Canonical application, project builds, Git mutation, deployment, and
publication remain external integration actions. Passive revision detection may read the current Git
commit when Git is available; it cannot change repository state.
## Versioned contracts
- Project descriptor schema: `schemas/project.schema.json`, version 1.
- Node schema: `schemas/node.schema.json`, version 1.
- Edge schema: `schemas/edge.schema.json`, version 1.
- Result envelope: `schemas/result.schema.json`, version 1.
- Changeset schema: `schemas/changeset.schema.json`, version 1, reserved for DFG-3.
- Index schema: version 1, disposable and reproducible.
- Core and CLI: version 0.1.0.
Schema files describe the generic interchange contract. Runtime validation remains responsible for
path confinement, source hashing, relationship resolution, dependency cycles, project limits, stale
state, and adapter-specific rules that JSON Schema cannot prove by itself.
## Generic node storage
Markdown nodes begin with a TOML metadata block delimited by `+++`. The remaining Markdown is the
node content. TOML sources contain one or more `[[nodes]]` tables and store content in a `content`
field. Every node has a stable project-wide ID.
The generic authority vocabulary is `authoritative`, `approved_plan`, `derived`, `proposal`, and
`historical`. Projects define statuses and allowed relationship names in their descriptor. The core
gives special acyclic validation to `depends_on`; adapters may add stricter rules.
## Result identity
Successful operations identify the project, adapter, current revision when available, and canonical
source hash. Errors use a stable code, direct message, and structured details. Query operations fail
if canonical source no longer matches the derived index.
## Write model reserved for DFG-3
Create, update, move, and delete are ordered node operations inside an isolated changeset. Every
operation names its expected base hash. A move preserves the stable node ID. A delete must resolve
required incoming relationships. Validation and application are atomic; prose is never auto-merged.
Normal MCP access will not expose canonical application or arbitrary file writes.