executus/CLAUDE.md

executus — developer & agent guide

⚠️ This project is vibe-coded (AI-authored, human-steered). See README.md.

executus is a batteries-included base for LLM agent harnesses, layered strictly above majordomo. majordomo is the lean substrate (agent loop, llm types, providers, media, parse/failover/tiering). executus is the opinionated layer majordomo deliberately omits. executus requires no majordomo changes — it decorates llm.Model and wraps majordomo/agent.Agent.

North star

A brand-new project imports executus, does a little setup, and is most of the way to agentic capabilities. The mechanism is one shipped default per seam: executus.New() (once the runtime lands) is agentic with zero host wiring; the same builder lets a serious host swap each default for its own implementation and register its own tools.

Two consumers define the envelope:

• mort (heavy) — Discord, mortbux, media, MySQL/GORM, DB-backed convar config, saved skills, audit, scheduling, run-critic.
• gadfly (light) — a CI PR-reviewer Docker image, env-var configured, running an N-models × M-lenses structured-output swarm. Needs model fleet, lanes, bounded runs, structured output, fan-out, a few read tools — and none of the batteries.

That spread is why executus is tiered: a light host imports core only; a heavy host opts into batteries.

Module & layering

One module gitea.stevedudenhoeffer.com/steve/executus, go.mod = majordomo + stdlib only (no gorm/redis/discordgo/cgo). A second nested module contrib/store carries the SQLite dependency so the core never inherits it.

CORE (majordomo + stdlib):
  config/   ConfigSource seam (+ env default)            [P0 ✓]
  lane/     bounded fair-share worker pool               [P0 ✓]
  fanout/   programmatic N×M swarm                       [P0 ✓]
  deliver/  output egress seam (+ Discard/Stdout)        [P0 ✓]
  identity/ caller identity seams                        [P0 ✓]
  run/      run.Executor is RUNNABLE: model-resolve +    [P2 core ✓]
            toolbox + majordomo loop + compaction +
            run-bounding (V10 detached timeout) + step/
            audit observers + Budget gate; RunnableAgent
            DTO + nil-safe run.Ports. Follow-ups: wire
            Critic/Checkpointer/PaletteSource/Delivery,
            Phases, and the no-tools direct path         [P2]
  dispatchguard/  loop/depth/fan-out caps                [P0 ✓]
  pendingattach/  attachment dedupe                      [P0 ✓]
  tool/     registry + 3-stage permissions + ssrf        [P1 ✓]
  model/    config-driven tier resolution over majordomo [P1 ✓]
            (convar->config.Source; UsageSink/TraceSink seams; GenerateWith[T]
             structured output — no separate structured/ pkg)
  llmmeta/  shared meta-LLM helper over model/            [P1 ✓]
  compact/  context compactor (WithCompactor hook)       [P2 ✓]
  tools/    generic tool library: Register (think/now/    [P3 ✓]
            cite, zero-config) + RegisterMeta (classify/
            extract_entities/summarize) + RegisterStore
            (kv_*/file_*, default static quota); seams in
            research_providers.go/file_storage.go/
            kv_storage.go/quota_provider.go. End-to-end
            "agent calls a tool" test green. Remaining
            (deferred): web/net/compose groups + backends

BATTERIES (opt-in siblings, each nil-safe + a default):
  persona/   Agent noun + Storage seam + builtin loader [P4 ✓]
             + ToRunnable() bridge to run.RunnableAgent +
             Memory default (host: chatbot/commands/personalization)
  skill/     Skill noun + LEAN SkillStore (lifecycle/    [P4 ✓]
             versions/schedule, NOT mort's 60-method
             monster) + ToRunnable + Memory default
  audit/     run.Audit Sink + Writer + queryable Memory  [P4 ✓]
             default (skillaudit Storage iface; GORM stays in mort)
  critic/    two-tier timeout watchdog (run.Critic) +    [P4 ✓]
             Escalator policy seam + ExtendOnce default
  schedule/  generic cron Runner (Tick/Loop over a wired [P4 ✓]
             Due/Run/Mark/Next; no cron grammar of its own)
  checkpoint/ CheckpointStore + run.Checkpointer handle  [P4 ✓]
             (throttled Save/Complete/Fail) + Memory
  budget/    DBBudget rolling-7d + NoOp (run.Budget);    [P4 ✓]
             BudgetStorage iface + Memory default

contrib/store/   SECOND module (+ modernc.org/sqlite):   [P4 ✓]
  pure-Go SQLite impls of ALL store seams: budget +
  persona + skill + audit (JSON-blob+indexed cols,
  round-trip tested). CI proves the driver lands HERE,
  not in the core go.sum.

NOTE: critic/checkpoint executor wiring (run.Ports.Critic /
.Checkpointer call sites) is a P2 follow-up — the batteries +
defaults exist ahead of that wiring.

The one architectural move

The kernel must import no battery. In mort today, agentexec imports agents, agentcritic, and skillaudit directly — those three up-pointing edges get inverted into nil-safe run.Ports interfaces (PaletteSource, Critic, Audit) plus a RunnableAgent DTO. Everything else is wide-but-shallow repackaging.

Invariants (enforced in CI)

• The core module builds with majordomo + stdlib only. go.sum must not contain gorm/redis/discordgo/sqlite/gin.
• No core/* package imports a battery/* package.
• Standard Go gates: go build, go vet, go test -race, go mod tidy clean.

Extraction roadmap

P0 module + zero-coupling moves + core seams (this) → P1 tool registry + model → P2 run kernel + Ports inversion → P3 generic tools + defaults → P4 persona/skill redesign + batteries + SQLite store → P5 gadfly-on-core canary (examples/reviewer ✓) → P6 rewire mort + tag v0.1.0. The mort-side rewrite reuses mort's existing mort_*_adapters.go wall as the host adapter layer.

Conventions

• Keep README.md, this CLAUDE.md, and examples/ in sync with every change, in the SAME commit. No aspirational docs: when you add/rename a package, change a seam or a default, or alter the public API, update the docs and the relevant example so they always reflect reality (mirrors majordomo's house rule). The status markers in the tier map above must track what's actually landed.
• Mirror majordomo's house style: gofmt; check errors immediately and wrap with fmt.Errorf("...: %w", err); // Why: comments where rationale isn't obvious; hermetic tests (majordomo's fake provider; no network in the default suite).
• Every seam is an interface with a nil-safe accessor and a shipped default.
• Keep the core seam surface small and stable — push churn into tools and host adapters, not core interfaces.