steve df95425bb5 P3 (kickoff): generic tools/ library + end-to-end tool-using-agent test
Stand up executus/tools — the generic, host-agnostic tool library — and prove
the full pattern end to end:

- tools/tools.go: Register(reg) adds the always-available zero-dependency tools
  (currently `think`). A light host calls it and is immediately useful; backed
  tools (web/store/meta groups) will register via grouped registrars with
  nil-safe Deps as they land.
- tools/think.go: the `think` tool moved from mort (imports only executus/tool).
- tools/integration_test.go: end-to-end proof that the executor runs an agent
  which CALLS a registered tool — the fake model emits a `think` tool call, the
  executor dispatches it through the registry, the model finalises, and the step
  instrumentation captures the `think` step. Exercises the full tool-dispatch
  loop through run.Executor.

Stacked on phase-2-run-kernel (P3 needs run.Executor). Remaining P3: the
meta/web/net/store/compose groups + their Deps + default backends (splitting
mort's default.go grab-bag).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-27 00:11:54 -04:00

executus

⚠️ This project is vibe-coded. executus is written almost entirely by an AI coding agent (Claude), with a human steering at the design and review level rather than typing the code. That's a deliberate choice, stated up front — the same way gadfly is. Read the code before you depend on it, pin a version, and file issues if something looks off. It is offered as-is.

A batteries-included base for building LLM agent harnesses in Go. Import it, do a little wiring, and you have agentic capabilities: a bounded run loop, a tool registry with a suite of common tools, context compaction, config-driven model tiering and failover, structured output, and parallel fan-out — with sensible defaults so a brand-new project is agentic with almost no setup, and pluggable seams so a serious host can swap in its own storage, config, delivery, and tools.

executus sits strictly above majordomo — the lean LLM substrate (agent loop, canonical llm types, providers, media normalization, model parsing / failover / tiering). majordomo stays the substrate; executus is the opinionated, batteries-included layer on top. executus requires no changes to majordomo.

Status

Early. Being extracted, phase by phase, from the agent layer of mort (a Discord bot) — mort and gadfly are the first two consumers (heavy and light). See CLAUDE.md for the architecture and the extraction roadmap (P0P6).

Available today:

  • run/executus is runnable. run.Executor ties model resolution, the tool registry, majordomo's agent loop, context compaction, run-bounding, and step/audit instrumentation into one Run(ctx, RunnableAgent, inv) Result, with every host concern behind a nil-safe run.Ports (Audit/Budget/Critic/ Checkpointer/PaletteSource/Delivery). See examples/minimal.
  • model/ — config-driven tier resolution + failover over majordomo, with pluggable UsageSink/TraceSink and GenerateWith[T] structured output.
  • tool/ — the tool registry + 3-stage permission model + SSRF guard.
  • compact/ — the per-run context compactor.
  • lane/ — bounded worker pool with fair-share queueing (run- and provider-concurrency).
  • fanout/ — programmatic N×M swarm with bounded global + per-key concurrency.
  • config/, deliver/, identity/ — host seams (config / output / identity), each with a shipped default.
  • dispatchguard/, pendingattach/ — run-safety primitives.

Design

Two tiers in one module (go.mod = majordomo + stdlib only):

  • Core — everything a light host needs to be agentic: run loop, tool registry + common tools, model resolution, compaction, lanes, fan-out, structured output. No persistence, no scheduling.
  • Batteries (opt-in sibling packages) — persona/agent nouns, saved skills, audit, run-critic, scheduling, budgets, checkpointing. Each is nil-safe and ships a default, so you add only what you use.

Persistence that needs a real database lives in a separate nested module (contrib/store, pure-Go SQLite) so the core never drags in a DB driver — a static-binary host (gadfly) stays static.

License

TBD.

S
Description
Batteries-included base for building LLM agent harnesses in Go (above majordomo). Vibe-coded.
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