# KeiSeiKit — Constructor-Pattern Agent Kit for Claude Code

KeiSeiKit is a drop-in agent fleet for [Claude Code](https://claude.com/claude-code). It ships a curated set of composable behavioral blocks, a Rust assembler that builds agent `.md` files from TOML manifests deterministically, three pre-wired hooks, and six portable skills including an interactive `/new-agent` wizard. Everything follows a Constructor Pattern: one file per concern, manifests as single source of truth, and the generated agent files are regenerated on every relevant edit.

The kit is MIT-licensed and fully generic — install it on a fresh machine and you get a sane 12-agent fleet (implementers, critics, researchers, cost-guardians, and more — all namespaced under `kei-*` so they won't collide with your own same-named agents), a wizard for spinning up new project specialists, and a build pipeline that keeps every agent derivable from its manifest.

## Prerequisites

- **Rust** (stable toolchain) — the assembler is a small Cargo binary
- **jq** — used by the three shell hooks for JSON parsing (`brew install jq` / `apt install jq`)
- **Claude Code** — the agents, hooks, and skills target Claude Code's agent / skill / hook surface

## Install

```bash
git clone <your-fork-of-this-repo> KeiSeiKit
cd KeiSeiKit
./install.sh
```

`install.sh` is idempotent. It:

1. Creates `~/.claude/agents/{_blocks,_manifests,_templates,_assembler,_generated}`, `~/.claude/hooks`, `~/.claude/skills`
2. Copies all blocks (overwrites — blocks are SSoT from the kit)
3. Copies generic manifests (skips if you already have a manifest with that name)
4. Builds the Rust assembler (`cargo build --release`)
5. Generates agent `.md` files in-place with `AGENT_ROOT=~/.claude/agents assemble --in-place`
6. Copies the three hooks and six skills

After install, the only remaining step is merging `settings-snippet.json` into your `~/.claude/settings.json` to activate the hooks. You can do this automatically with `./install.sh --activate-hooks` or answer `y` at the end-of-install TTY prompt.

> **Re-install disclaimer (v0.1.1):** `install.sh` is idempotent for clean state but **overwrites kit-owned `_blocks/`, `_templates/`, `_assembler/`, `hooks/`, and `skills/` on re-run** — local modifications under those directories are backed up to `<dir>.bak-TIMESTAMP/` (or, for shared hook files, to `<file>.bak-TIMESTAMP`). User-owned `_manifests/*.toml` are never overwritten.

## What you get

| Category | Count | Examples |
|---|---:|---|
| Behavioral blocks | 33 | `baseline`, `evidence-grading`, `rule-math-first`, `stack-rust-axum`, `deploy-modal`, `api-fal-ai`, ... |
| Generic agents (manifests) | 12 | `kei-code-implementer`, `kei-critic`, `kei-validator`, `kei-security-auditor`, `kei-architect`, `kei-researcher`, `kei-ml-implementer`, `kei-cost-guardian`, `kei-modal-runner`, ... |
| Hooks | 3 | `assemble-agents` (PostToolUse), `assemble-validate` (PreToolUse Bash), `no-hand-edit-agents` (PreToolUse Edit/Write) |
| Skills | 6 | `new-agent`, `research`, `test-gen`, `pr-review`, `refactor`, `debug-deep` |

Of the 33 blocks, the **8 base blocks** (`baseline`, `evidence-grading`, `memory-protocol`, `rule-pre-dev-gate`, `rule-test-first`, `rule-error-budget`, `rule-double-audit`, `rule-math-first`) are referenced directly by the 12 shipped manifests. The remaining **25 blocks** (`stack-*`, `deploy-*`, `api-*`, `scraper-*`, `domain-*`) are a library consumed by the `/new-agent` wizard: when you compose a project specialist, the wizard picks the appropriate stack / deploy / API / scraper / domain blocks and emits a manifest that references them. The kit's generic 12 agents do not import them by default.

## Creating a new agent

Run the wizard in Claude Code:

```
/new-agent
```

You'll be asked (via option-pickers, not free-text):

1. Project stack (Rust CLI / axum / SwiftUI / Flutter / FastAPI / Next.js / Go / Embedded / Python ML)
2. Deploy target (local-only / EC2 / Cloudflare / Modal / Docker / none)
3. Uses paid APIs? (Yes / No)
4. Contains ML? (Yes / No)
5. Has credentials? (Yes / No)
6. Uses scrapers? (None / Free-tier / Paid tier)

Then one free-text prompt for slug + description + path + gotchas. The wizard composes the manifest, validates it, assembles the `.md`, and prints a two-step git-commit command you can run or edit first.

## Architecture

```
  Manifest (_manifests/<name>.toml)          <-- source of truth
         |
         |   [assembler/src/*.rs]              <-- Rust binary
         v
  Generated agent (.claude/agents/<name>.md)  <-- regenerated, never hand-edited
         ^
         |                                     [hook: assemble-agents]
  Block edit (_blocks/<block>.md)             <-- triggers rebuild of ALL agents
```

Three hooks enforce the pipeline:

- **`assemble-agents`** (PostToolUse, Write/Edit) — rebuilds the affected agent(s) whenever a manifest or a block changes. No manual rebuild needed.
- **`assemble-validate`** (PreToolUse, Bash) — blocks `git commit` inside `~/.claude` if any manifest fails validation. Keeps the repo in a buildable state at all times.
- **`no-hand-edit-agents`** (PreToolUse, Edit/Write) — refuses edits to any `.md` under `~/.claude/agents/` that starts with the `<!-- GENERATED -->` marker, pointing you at the manifest instead. Override with `AGENT_MIGRATION=1` for emergencies only.

## Adding custom blocks

Blocks are plain markdown in `~/.claude/agents/_blocks/`. To add one:

1. `touch ~/.claude/agents/_blocks/stack-mystack.md` and write the block.
2. Reference it in a manifest's `blocks = [...]` list.
3. The PostToolUse hook rebuilds the affected agent(s) automatically.

Blocks should be 10-50 lines, single-concern, and readable in isolation. If a block exceeds ~60 lines, split it into two.

## Adding custom manifests

Copy `_templates/specialist.toml.template` and fill the placeholders, OR run `/new-agent` and answer the wizard. Either way, the assembler validates the manifest and generates the `.md` on write.

## Agents overview

All kit agents are namespaced under `kei-*` so they won't collide with your own agents (e.g. your personal `validator` or `critic`) living in `~/.claude/agents/`.

| Agent | Role |
|---|---|
| `kei-code-implementer` | Write production code, Constructor Pattern enforced, Test-First discipline |
| `kei-infra-implementer` | Deploy scripts, CI/CD, secrets management, cost-aware paid infra |
| `kei-ml-implementer` | Training scripts, inference code, Modal jobs, exact param counts |
| `kei-critic` | Read-only anti-pattern / bug / security / perf / debt finder |
| `kei-validator` | Fact-checker; verifies API existence, version compat, citations, doc claims |
| `kei-security-auditor` | Risk-classified security audit with variant analysis + supply chain check |
| `kei-architect` | Read-only structural analysis; dep graph, patterns, coupling |
| `kei-researcher` | Generic web + codebase research, evidence-graded findings |
| `kei-ml-researcher` | ML literature, benchmarks, reproducibility, tooling-reuse search |
| `kei-cost-guardian` | Pre-launch GO/NO-GO for paid compute (Modal, AWS, fal.ai, Apify, etc.) |
| `kei-modal-runner` | Modal compute orchestrator with KILL GUARD (never stops running jobs) |
| `kei-fal-ai-runner` | fal.ai image/video/3D generation expert |

## Cross-tool bridges

KeiSeiKit ships 11 verified tool-bridge templates under `_bridges/`. Render them into any project and the same Constructor-Pattern ruleset is visible to every AI coding tool you use — no drift, one source of truth.

**Tools covered:**

| Tool | Output file |
|---|---|
| Cursor (legacy) | `.cursorrules` |
| Cursor (modern MDC) | `.cursor/rules/main.mdc` |
| Codex CLI / Warp / Zed / Antigravity fallback | `AGENTS.md` |
| GitHub Copilot | `.github/copilot-instructions.md` |
| Windsurf | `.windsurf/rules/main.md` |
| JetBrains Junie | `.junie/guidelines.md` |
| Continue.dev | `.continue/rules/main.md` |
| Google Antigravity / Gemini CLI | `GEMINI.md` |
| Aider | `CONVENTIONS.md` + `.aider.conf.yml` |
| Replit Agent | `replit.md` |

**Two ways to generate:**

1. **At install time** — `./install.sh --with-bridges` renders all 11 into `$PWD` after the normal install completes. Skipped if `$PWD` is the KeiSeiKit repo itself.
2. **From the `/new-agent` wizard** — Phase 8 asks click-only whether to generate all 11, just `AGENTS.md`, or skip.
3. **Manually, any time** — `~/.claude/agents/_bridges/emit.sh <project-dir>` (the install copies `_bridges/` into your agent fleet dir). Add `--only <output-path>` to restrict to a single file.

All paths are idempotent: existing bridge files in the project are skipped, never overwritten. See `_bridges/README.md` for the full template→output-path table.

## Meta-composer

`/compose-solution` is the meta-creator: tell it what you want to solve in one free-text paragraph, it decomposes the task, greps existing blocks / skills / manifests / bridges for prior art, proposes a minimal math-first architecture, and assembles the right artefact — agent, skill, hook, rule, or block. Every decision except the intake is a click (option-picker), never free-text.

Example: "I want a hook that blocks `rm -rf ~/` in any Bash call" → Phase 2 decomposes into (pattern-match, severity, event, wiki entry) → Phase 3 greps `hooks/` and `_blocks/` for prior art → Phase 5 proposes `hook = PreToolUse:Bash + pattern + exit 2` → Phase 7 hands off to `/escalate-recurrence` with severity and event pre-filled.

Phase 6 is the feedback loop: when a component has no prior art, the skill drafts a new `_blocks/<slug>.md` and — on your click — persists it. Next time `/compose-solution` (or `/new-agent`) runs, that block is discoverable. Every session leaves the kit a little smarter; the report prints `_blocks/` count before → after so the growth is visible.

See `skills/compose-solution/SKILL.md` and its phase files (`phase-1-intake.md` through `phase-7-assemble.md`) for the full 7-phase pipeline.

## License

MIT. See `LICENSE` in this directory.