M13 VESSEL: Content-on-Node

[flyingrobots]

Milestone: M13 VESSEL — Content-on-Node

Attach rich content (markdown, text, etc.) to graph nodes using git's native CAS. Content SHAs stored as WARP node properties — CRDT merge comes for free.

Property convention

_content.sha       → git blob SHA (hash-object -w)
_content.mime      → MIME type (e.g. "text/markdown")
_content.size      → byte count
_content.encoding  → "utf-8" | "base64"

Sub-issues

• [CAS-001] Content store core — src/content.js #272 CAS-001: Content store core (src/content.js)
• [CAS-002] CLI content set|show|meta|delete commands #273 CAS-002: CLI commands (content set|show|meta|delete)
• [CAS-003] CLI JSON schema contracts for content commands #274 CAS-003: CLI JSON schema contracts
• [CAS-004] Content store tests + integration canaries #275 CAS-004: Tests

Design notes

• No new dependencies — uses git hash-object -w / git cat-file blob via existing plumbing
• graph.js refactored to expose plumbing instance
• --as-of intentionally excluded — WARP ticks ≠ git commits (see ADR-0004 discussion)
• Aligns with ADR-0004 "property convention" approach

Relates to

• North Star Vision §6B (Content-on-node)
• ADR-0004 (Content Attachments Belong in git-warp)
• Existing schema: docs/contracts/node-content.schema.json

[flyingrobots]

Completed and merged in PR #276. All sub-issues delivered:

• CAS-001 ([CAS-001] Content store core — src/content.js #272): Content store core — writeContent, readContent, getContentMeta, hasContent, deleteContent
• CAS-002 ([CAS-002] CLI content set|show|meta|delete commands #273): CLI commands — content set|show|meta|delete with --mime, --raw, --json
• CAS-003 ([CAS-003] CLI JSON schema contracts for content commands #274): JSON schema contracts for all 4 content CLI outputs
• CAS-004 ([CAS-004] Content store tests + integration canaries #275): 37 tests covering core, CLI, and schema validation

5 rounds of CodeRabbit review, 21 threads resolved. v3.3.0.