Acolyte

Acolyte is a terminal-first AI coding agent: local-first, observable, extensible. This skill is a map of the codebase — it tells you where to look. Read AGENTS.md for invariants and rules. Read the linked docs for detail.

Architecture

CLI → daemon (RPC) → lifecycle → model + tools

Subsystem	Key concepts	Docs
Lifecycle	Single-pass: resolve → prepare → generate → finalize. Effects apply per-tool-result. Model ends the turn with a native end_turn (a step with no tool calls); that step's text is the final response	docs/lifecycle.md
Tools	runTool: budget → cache → toolkit → registry. Toolkits cover file, code, undo, session, signal, memory, skill, test, tasklist, gh, git, web, and shell	docs/tooling.md
Sessions	Persistent conversation context, history, model selection, and token usage	docs/sessions.md
Tasks	State machine: accepted → queued → running → completed|failed|cancelled	docs/tasks.md
Memory	On-demand via toolkit, not injected. Observer distills facts via memory-observe tool calls. SQLite + semantic embeddings	docs/memory.md
TUI	Custom React reconciler. Three primitives: Box, Text, Static	docs/tui.md
Providers	Pluggable: OpenAI, Anthropic, Google, Vercel AI Gateway, OpenAI-compatible locals	docs/configuration.md
Workspace	Sandbox scopes file ops to project root. Profile detection infers ecosystem and commands	docs/workspace.md
Protocol	WebSocket JSON envelopes with request correlation and task state transitions	docs/protocol.md
CLI	Command registry, daemon spawn, argument parsing	docs/cli.md
Errors	Structured error codes and kinds, consistent shaping across layers	docs/errors.md
Localization	Locale catalogs in src/i18n/locales/*.json, en fallback	docs/localization.md

What to read when

Task	Start here
Adding or modifying a tool	docs/tooling.md, then the relevant *-toolkit.ts
Changing lifecycle behavior	docs/lifecycle.md, then src/lifecycle-*.ts
Working on the TUI	docs/tui.md, then src/tui/
Changing memory behavior	docs/memory.md, then src/memory-*.ts
Adding a provider	src/provider-*.ts, docs/configuration.md
Modifying RPC or task flow	docs/protocol.md, docs/sessions.md, docs/tasks.md
Changing workspace detection	docs/workspace.md, then src/workspace-*.ts
Adding a CLI command	docs/cli.md, then src/cli-command-registry.ts
Adding or changing error codes	docs/errors.md, then src/error-contract.ts
Updating bundled skills	docs/skills/{name}.md; these are Acolyte's built-in skills.

Extension patterns

Extension	How
Tool	Create or extend src/{domain}-toolkit.ts with createTool + runTool, register in src/tool-registry.ts
Bundled skill	Create docs/skills/{name}.md, add text import in src/bundled-skills.ts, add to BUNDLED_SKILLS
Project skill	Create .agents/skills/{name}/SKILL.md — scanned automatically
Lifecycle effect	Define Effect in src/lifecycle-effects.ts, add to PRE_EFFECTS or POST_EFFECTS
Ecosystem detector	Define EcosystemDetector in src/workspace-detectors.ts, add to ECOSYSTEM_DETECTORS
Provider	Add src/provider-{name}.ts, register in provider resolution
CLI command	Add to src/cli-command-registry.ts

Testing

Type	Pattern	When to use
Unit	*.test.ts	Pure logic, schemas, contracts
Integration	*.int.test.ts	Real server/lifecycle/tool wiring
Visual	*.tui.test.tsx	TUI rendering snapshots
Perf	*.perf.test.ts	Latency trend detection

Helpers: tempDir() for filesystem fixtures, tempDb() for SQLite stores, createSessionContext() for tool tests. Full check: bun run verify. See docs/testing.md.