🧵 pi-thread-engine

"When you start thinking in threads, you stop being a bottleneck and become an orchestrator." — @IndyDevDan, Thinking in Threads

Thread-Based Engineering for Pi Coding Agent. 7 thread types + stories + fusion + zero-touch + full TUI dashboard. Built on @IndyDevDan's framework from agenticengineer.com.

Install

pi install npm:pi-thread-engine

The Thread Framework

Everything starts with the base thread:

PROMPT → TOOL CALLS → REVIEW
  You      Agent       You

You show up at two nodes for maximum leverage. Your agent handles everything in between.

Then you multiply:

Thread Types
├── Base    → You → Agent → You (minutes)
├── P       → Parallel 5+ agents (hours)
├── C       → Checkpoint chains (high-stakes)
├── F       → Fusion 9 agents, pick winner
├── B       → Branch (orchestrator agents)
├── L       → Long-running 26hrs (days)
└── Z       → Zero-touch, no review (ultimate)

Commands

Command	Type	What
/threads	Dashboard	TUI: 3-column status view, search, inline reply, keyboard nav
/pthread	P-Thread	N independent tasks in parallel
/cthread	C-Thread	Sequential phases with checkpoint reviews
/bthread	B-Thread	scout → plan → build → review pipeline
/fthread	F-Thread	Same prompt → N models → compare, pick winner
/zthread	Z-Thread	Autonomous + verification gate (ships only if tests pass)
/lthread	L-Thread	Extended autonomous run
/story	Stories	Auto-decompose goal into thread phases
/agents	Alias	Same as /threads — Claude muscle memory

Dashboard

Run /threads (or /agents) to open the TUI dashboard:

  🧵 Thread Dashboard
  ═══════════════════════════════════════════

  ⚡ Needs Input (2)
  ▸ t-001  ████████░░  needs_input  /fix bug in auth     → "password has special chars"
  ▸ t-003  ░░░░░░░░░  needs_input  /audit dependencies  → "found 3 vulnerable"

  ⚙ Working (3)
  ▸ t-002  ██████░░░░  running  /migrate database        ⏱ 4m 23s
  ▸ t-004  ████░░░░░░  running  /build API endpoints     ⏱ 2m 11s
  ▸ s-001  →scout→plan→build  running  /story add payments

  ✓ Done (4)
  ▸ t-005  ██████████  success  /refactor auth module     → "cleaned up 12 files"
  ▸ t-006  ██████████  success  /update docs             → "30 pages updated"
  ▸ t-007  ██████████  error    /deploy to prod          ✗ "missing env vars"

  nav=↑↓ exp=Enter rep=i srch=/ kill=k rev=r prune=p quit=q

Keyboard shortcuts:

• ↑↓ — navigate threads
• Enter — expand/collapse thread details
• i — inline reply (send message to blocked thread)
• / — search/filter threads
• k — kill selected thread
• r — review selected thread results
• p — prune (clear) finished threads
• q — quit dashboard

Thread Types in Depth

P-Thread — Parallel

Five in the terminal. Five to ten in the browser. Zero apologies. — Boris Cherny, creator of Claude Code

/pthread "Review all PRs" --count 8
/pthread "Fix bug in auth" --count 3 --each

C-Thread — Checkpoint Chains

High-stakes work needs verification at critical junctures. Intentional chunking is a feature, not a bug.

/cthread "Migrate to new database" --phases scout,plan,build,test,deploy

F-Thread — Fusion (pi-thread-engine unique)

Nine agents. Nine parallel futures. Pick the winner.

/fthread "Design the caching architecture" --count 5
/fthread "Refactor the auth module" --models claude,gpt-4o,gemini-pro

Best-of-N gives you confidence. Cherry-picking gives you quality. Each agent runs in complete isolation — no cross-contamination.

B-Thread — Branch/Meta-Agentic

When agents manage agents. You become an Orchestrator of Intelligence.

/bthread "Build the checkout flow"

Auto-runs: plan agent → scout → build → review → deploy

L-Thread — Long-Running

A single prompt that ran 26 hours.

/lthread "Audit and fix all security vulnerabilities" --hours 24

Z-Thread — Zero-Touch (pi-thread-engine unique)

Maximum earned trust. No review node. Ships only if verification passes.

/zthread "Fix all ESLint warnings" --verify "npm run lint"
/zthread "Add dark mode" --verify "npm test && npm run build"

This is NOT vibe coding. Z-threads are the opposite: maximum earned trust through hundreds of iterations.

Stories — Goal Decomposition (pi-thread-engine unique)

Auto-decompose a goal into thread phases. pi-thread-engine picks the right type for each.

/story "Add dark mode to the dashboard" --verify "npm test"

Auto-generates phases:

1. Scout (meta) — research the codebase
2. Plan (fusion) — 3 models brainstorm approaches
3. Decide (checkpoint) — human picks the winner
4. Build (parallel) — implement across files
5. Verify (zero) — run tests

LLM Tools

Use these inside any Pi prompt:

thread_spawn({ type: "parallel", prompts: [...] })  // Start any thread type
thread_status({ id: "t-001" })                       // Check progress
thread_kill({ id: "t-001" })                         // Stop a thread

The Core Four

Every thread runs on these four pillars. Invest in all of them:

Pillar	Description	pi-thread-engine
Context	Right information (no more, no less)	~/.pi-memory/ integration
Model	Capable of sustained reasoning	324+ models via OpenRouter
Prompt	Crystal-clear agentic engineering	Structured commands
Tools	Self-verifying, comprehensive	40+ pi-skills

Measuring Progress

You know you're improving at agentic coding when:

• Width ↑ — P-threads = 5x exploration per hour
• Time ↑ — L-threads = 10min → 8hrs autonomous work
• Depth ↑ — B-threads = one prompt → entire teams
• Checkpoints ↓ — Earned trust through evidence

The common denominator: increase tool calls per unit of your attention.

Architecture

┌─────────────────────────────────────────────────────┐
│                   pi-thread-engine                  │
├─────────────┬──────────────┬────────────────────────┤
│  Dashboard  │  Registry    │  Executor              │
│  (TUI v3)   │  (state)     │  (dispatch)            │
├─────────────┴──────────────┴────────────────────────┤
│  Commands: /threads /pthread /cthread /fthread     │
│            /bthread /zthread /lthread /story        │
├─────────────────────────────────────────────────────┤
│  Backends                                           │
│  ├─ pi-subagents (P/C/B threads)                   │
│  └─ native (F/Z/L threads, Stories)                 │
└─────────────────────────────────────────────────────┘

Further Reading

• Thinking in Threads — @IndyDevDan
• The Only Claude Code Competitor
• Compute Advantage Equation
• Engineering with Exponentials