# Adaworldapi Lance Graph Cca2a

> CCA2A — Claude Code Agent-to-Agent

- Skill: `tomevault-io/adaworldapi-lance-graph-cca2a` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add tomevault-io/adaworldapi-lance-graph-cca2a`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/adaworldapi-lance-graph-cca2a/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: tomevault-io (https://skillmd.com/u/tomevault-io)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/tomevault-io/adaworldapi-lance-graph-cca2a

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# CCA2A — Claude Code Agent-to-Agent

Explanation-only skill. Documents the pattern so a new session can
grok it once instead of the user re-deriving it for 30 turns.

**Canonical files** (read these, not template copies):

**Entry points:**
- `.claude/BOOT.md` — session entry point (one page).
- `CLAUDE.md` — workspace spec, links to all of the below.

**Eight bookkeeping files** (rows are history; specific fields are
state; never delete a row; method hierarchy: APPEND preferred →
Edit-field after prior Read → Write prompts for confirmation):

_History / dashboards:_
- `.claude/board/LATEST_STATE.md` — current contract inventory.
- `.claude/board/PR_ARC_INVENTORY.md` — APPEND-ONLY per-PR arc.
- `.claude/board/STATUS_BOARD.md` — deliverable-level dashboard.
- `.claude/board/INTEGRATION_PLANS.md` — versioned plan index.

_Kanban / audit (priority + scope tags on every entry):_
- `.claude/board/EPIPHANIES.md` — date-prefixed insight log.
  Status: FINDING / CONJECTURE / SUPERSEDED.
- `.claude/board/ISSUES.md` — Open + Resolved bugs / regressions.
  Double-entry: issue captured on discovery; Resolution appends on
  close. Priority P0-P3, Scope @agent D<N> domain:<tag>.
- `.claude/board/IDEAS.md` — Open + Implemented + Rejected
  speculation. Triple-entry: idea captured, shipped appended,
  plan-update logged. Priority + Scope.
- `.claude/board/TECH_DEBT.md` — Open + Paid knowingly-deferred
  work. Priority + Scope + Introduced-by-PR + Payoff-estimate.

**Agent ensemble + orchestration:**
- `.claude/agents/BOOT.md` — orchestration spec + Knowledge
  Activation + Handover Protocol.
- `.claude/agents/README.md` — function inventory of all agents.

**Governance + hooks:**
- `.claude/settings.json` — team-shared governance (ask-on-Edit for
  the two strictest bookkeeping files, deny on destructive ops,
  SessionStart + PostCompact hooks).
- `.claude/hooks/session-start.sh` / `post-compact.sh` — inject
  bootload context at turn 0 / after compaction.

**Active plans:**
- `.claude/plans/<name>-v<N>.md` — indexed via
  `INTEGRATION_PLANS.md`. Old versions stay with Status annotation;
  new versions prepend.

## What to read when

- **New session on this workspace:** `.claude/BOOT.md` first, then
  the three mandatory reads it lists.
- **Understanding the A2A two-layer model:**
  [concepts.md](concepts.md).
- **Comparing to official Claude Code conventions:**
  [divergence.md](divergence.md).
- **Concrete recipe: code awareness in ~90 s via prompt↔PR ledger:**
  [procedure-bookkeeping.md](procedure-bookkeeping.md). Three-pass
  Haiku→Opus→main-thread pipeline. First deployment: PR #213
  (lance-graph, 41 prompts) + PR #110 (ndarray, 25 prompts) on
  2026-04-19, both ~90 s wall clock.

## The idea in one paragraph

Every new session pays a 30-turn rediscovery tax rebuilding context
about what types exist, which conventions are locked, what work is
queued. CCA2A is the scaffold that cuts that to 3-5 turns: two
mandatory knowledge files that state current inventory and decision
history, one agent ensemble file that routes subagents, one hook
that injects critical state after compaction. Append-only
governance on the history files so drift can't erode the arc.

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> Source: [AdaWorldAPI/lance-graph](https://github.com/AdaWorldAPI/lance-graph) — distributed by [TomeVault](https://tomevault.io).
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