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aimux

aimux is an MCP server for durable task state, session operations, deep research, binary upgrades, and caller-centered structured reasoning.

The current post-purge live surface is intentionally small:

• 4 server tools: status, sessions, deepresearch, upgrade
• 1 methodology-bearing task entry point for code and review workflows
• 1 caller-centered think harness plus 22 cognitive move tools

The former CLI-launching MCP tools (exec, agent, agents, critique, investigate, consensus, debate, dialog, audit, workflow) were removed from the live surface. Their pre-purge architecture is frozen at snapshot/v5.0.3-pre-cli-purge and documented in docs/architecture/cli-tools-current.md. The next Layer 5 surface is tracked separately by AIMUX-9 / DEF-1.

Install

From GitHub Release (recommended)

Download the latest release binary for your platform:

Windows (PowerShell):

$version = "5.12.0"
gh release download "v$version" --repo thebtf/aimux --pattern "aimux_${version}_windows_amd64.zip" --output aimux.zip
Expand-Archive aimux.zip -DestinationPath "$env:LOCALAPPDATA\aimux" -Force
Remove-Item aimux.zip
# Add to PATH (current session):
$env:PATH = "$env:LOCALAPPDATA\aimux;$env:PATH"
aimux.exe --version

Linux / macOS (bash):

version="5.12.0"
os=$(uname -s | tr '[:upper:]' '[:lower:]')
arch=$(uname -m | sed 's/x86_64/amd64/;s/aarch64/arm64/')
gh release download "v${version}" --repo thebtf/aimux --pattern "aimux_${version}_${os}_${arch}.tar.gz" --output aimux.tar.gz
mkdir -p ~/.local/bin
tar xzf aimux.tar.gz -C ~/.local/bin aimux
rm aimux.tar.gz
chmod +x ~/.local/bin/aimux
aimux --version

From Source

$env:GOTOOLCHAIN = "go1.25.10"
go build -o aimux.exe ./cmd/aimux/
.\aimux.exe --version

Requires Go 1.25.10 or newer.

Configure MCP Client

Add aimux to .mcp.json (Claude Code) or the equivalent config for your MCP client:

{
  "mcpServers": {
    "aimux": {
      "command": "aimux",
      "args": []
    }
  }
}

If the binary is not on PATH, use the full path:

{
  "mcpServers": {
    "aimux": {
      "command": "C:/Users/you/AppData/Local/aimux/aimux.exe",
      "args": []
    }
  }
}

Verify

Run tools/list from any MCP-capable client. A current build should expose 28 tools: the 4 server tools, the task entry point, the think harness, and 22 cognitive move tools.

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list",
  "params": {}
}

Commands

Common development and release checks:

$env:GOTOOLCHAIN = "go1.25.10"
go build ./...
go test ./... -count=1 -timeout 300s
go test ./tests/critical -count=1 -timeout 300s
$env:AIMUX21_E2E = "1"
go test ./test/e2e -run 'TestE2E_(AIMUX21|CodeEntry|ReviewEntry|TaskRouter|Resume)' -count=1 -timeout 600s
go vet ./...
go mod verify
govulncheck ./...

Set-Location loom
go test ./... -count=1

Use docs/PRODUCTION-TESTING-PLAYBOOK.md for customer-mode release walkthroughs.

MCP Tool Reference

Server Tools

Tool	Purpose
status	Query async job/task status.
sessions	List, inspect, cancel, kill, garbage-collect, and health-check session/task state.
deepresearch	Run Gemini-backed research with structured output.
upgrade	Check or apply aimux binary updates, including local source installs with truthful deferred fallback.

Task Entry Point

Tool	Purpose
task	Route code and review tasks through the Loom-backed worker with 3 execution modes.

The task tool supports three code execution modes controlled by the navigator parameter:

Mode	navigator	sandbox	Behavior
Pair	CLI name (e.g. "codex")	any	driver(read-only) → diff → navigator(review) → apply → gate
Solo write	"none"	workspace-write / danger	driver writes files directly → gate verifies
Solo diff	"none"	read-only	driver returns unified diff to caller

Codex CLI always uses --dangerously-bypass-approvals-and-sandbox --skip-git-repo-check --json. Prompt delivered via stdin controls mode behavior.

Task Inspection Resources

Resource	Purpose
aimux://tasks	Bounded read-only task list with snapshot/viewer/events/progress links.
aimux://tasks/{task_id}	Compact Loom task snapshot with status, progress summary, and resource links.
aimux://tasks/{task_id}/viewer	Self-contained read-only HTML view of snapshot, metadata, events, and progress.
aimux://tasks/{task_id}/events	Bounded lifecycle and terminal artifact page for one task.
aimux://tasks/{task_id}/progress	Bounded progress artifact page for one task.

Use these resources when a caller needs task evidence without reading daemon logs. Event and progress pages are cursor/limit paginated, and large task results are summarized in the snapshot resource. The HTML viewer is server-rendered from the same Loom/resource projection and contains no forms, buttons, scripts, or task execution controls.

Mutating code flows also add worktree preservation metadata to the task result and task snapshot metadata. Pair apply, write-review, and solo-write flows include worktree_path, worktree_branch, worktree_base_sha, and worktree_preserve_reason so callers can recover or review the touched worktree. Read-only recipes and solo-diff flows stay non-mutating and do not emit preservation metadata.

Curated Recipe Resources

Resource	Purpose
aimux://recipes	Compact compiled recipe catalog with IDs, descriptions, phases, policy needs, and output resource hints.
aimux://recipes/{recipe_id}	Detail view for one supported recipe. Unknown IDs return not_found plus available_recipes.

Initial recipes are read-only and route through the existing task entry point:

Recipe ID	Task class	Default mode	Purpose
code-review	review	gate	Run the existing review worker as a named code-review recipe.
second-opinion	review	aggregate	Run the existing review worker for an independent read-only assessment.

Invoke a recipe through task(recipe_id=..., target=...); no new workflow or recipe tool is added. Recipe policy is fail-closed before worker spawn: if the selected provider/profile cannot enforce the recipe's declared policy needs, task returns a non-retryable CapabilityMismatch and no Loom task is submitted.

Capability mismatch payloads include recipe_id, selected_cli, requested_policy, missing_capabilities, and supported_capabilities. Current enforced classes are read-only execution, structured JSON/JSONL output, target-required recipe arguments, plus compiled gates for future sandbox, approval, schema, max-turn, and version policies.

Read-only curated recipe invocations also carry deterministic replay metadata. For matching completed runs, task(recipe_id=...) can return the completed source task without submitting duplicate Loom work. The replay fingerprint uses recipe ID, replay key version, prompt, target, CWD, task/worker class, selected CLI, model/role/effort, and enforced policy fingerprints. Cache hits are visible in the returned task metadata as recipe_replay_cache_hit=true with recipe_replay_source_task_id; task resources expose the source task's recipe_replay_key_version, recipe_replay_fingerprint, and recipe_replay_cache_hit=false reusable-source marker. Failed, crashed, cancelled, running, policy-mismatched, non-recipe, and changed-precondition tasks are not replayed as success.

Caller Guide Resources

Resource	Purpose
aimux://guides	Compact catalog of compiled caller guides.
aimux://guides/caller	Markdown guide for task, think, task/recipe resources, replay metadata, viewer usage, and safety rules.

Use the compiled caller guide as the supported source for task, think, recipe, replay, viewer, and safety examples for the running binary.

Think Harness

think(action=start|step|finalize) is the canonical caller-centered thinking harness. The caller owns the final answer; aimux tracks visible work products, evidence, gate status, confidence ceilings, unresolved objections, budget state, and a bounded trace_summary.

Typical flow:

1. think(action=start, task=..., context_summary=...) creates a session and returns allowed cognitive moves plus a first prompt.
2. think(action=step, session_id=..., chosen_move=..., work_product=..., evidence=[...], confidence=...) records a visible move result and returns gate/confidence feedback.
3. think(action=finalize, session_id=..., proposed_answer=...) accepts only when the loop, evidence, confidence, objections, and budget gates support it.

Legacy think(thought=...) calls fail closed with a migration error. They do not route by keywords, create implicit sessions, or return pattern suggestion fields.

Cognitive Move Tools

The 22 cognitive move tools provide in-process structured reasoning moves. They do not spawn AI CLIs.

Tool	Use
architecture_analysis	Architecture tradeoffs and system structure.
collaborative_reasoning	Multi-perspective synthesis.
critical_thinking	Adversarial plan or claim review.
debugging_approach	Debug hypothesis planning.
decision_framework	Tradeoff analysis and decision records.
domain_modeling	Domain concepts, boundaries, and language.
experimental_loop	Iterate experiments and observations.
literature_review	Compare sources and findings.
mental_model	Explain or build conceptual models.
metacognitive_monitoring	Check reasoning quality and confidence.
peer_review	Review an artifact from a reviewer perspective.
problem_decomposition	Break complex work into tractable parts.
recursive_thinking	Revisit conclusions across levels.
replication_analysis	Assess reproducibility and missing evidence.
research_synthesis	Combine research evidence into conclusions.
scientific_method	Hypothesis, experiment, observation, conclusion.
sequential_thinking	Ordered step-by-step reasoning.
source_comparison	Compare claims across sources.
stochastic_algorithm	Explore randomized or probabilistic approaches.
structured_argumentation	Claims, evidence, objections, and rebuttals.
temporal_thinking	Timeline, sequencing, and time-based effects.
visual_reasoning	Spatial or visual structure reasoning.

Each per-pattern result includes gate status and an advisor recommendation. Stateless calls return gate_status: "complete"; stateful pattern sessions can request additional steps when the gate finds missing evidence or insufficient reasoning depth.

Architecture Overview

flowchart TD
    Client[MCP client] --> Server[aimux MCP server]
    Server --> Budget[response budget layer]
    Budget --> Sessions[sessions/status handlers]
    Budget --> Research[deepresearch handler]
    Budget --> Upgrade[upgrade handler]
    Budget --> Think[think harness and cognitive move handlers]
    Budget --> Task[task router]

    Sessions --> Loom[LoomEngine]
    Task --> Loom
    Task --> CodeWorker[code worker: pair / solo write / solo diff]
    Task --> ReviewWorker[review worker: structural / behavioural / adversarial]
    CodeWorker --> Codex[codex CLI via pipe + stdin]
    Loom --> SQLite[(SQLite task/session state)]
    Research --> Gemini[Gemini SDK]
    Think --> Gates[pattern gates and advisor]
    Upgrade --> Binary[local or release binary swap]

Loading

Loom Is Canonical Runtime State

Loom is the canonical runtime job/task state backend. The legacy JobManager runtime backend has been removed. Public session/status responses read from Loom-managed task state and legacy session metadata where needed for migration visibility.

The Loom engine is also a standalone nested Go module:

• Module path: github.com/thebtf/aimux/loom
• Consumer guide: loom/USAGE.md
• Contract: loom/CONTRACT.md
• Recovery guide: loom/RECOVERY.md

Repository Layout

Path	Purpose
cmd/aimux/	Server entry point and binary wiring.
pkg/server/	MCP tool registration, handlers, response budgeting, and transport wiring.
pkg/think/	Think pattern execution, gates, and advisor.
pkg/tools/deepresearch/	Gemini-backed deep research.
pkg/executor/code/	Code worker: pair rounds, solo modes, FSM, diff apply, gate.
pkg/executor/review/	Review worker: multi-pass structural/behavioural/adversarial pipeline.
pkg/executor/fallback/	Cross-CLI fallback engine with score-based re-ranking.
pkg/upgrade/, pkg/updater/	Binary update, local source install, and handoff/deferred coordination.
pkg/session/	Session metadata store.
loom/	Standalone durable task engine module.
tests/critical/	Release-blocking critical suite.
docs/	Public architecture and production testing documentation.

Current Scope And Roadmap

Current production surface:

• Session and task health/status operations.
• Deep research through Gemini SDK.
• Binary update with local source install and deferred fallback when live handoff is not supported.
• Caller-centered think harness and 22 local cognitive move tools.
• Loom-backed task state and recovery.
• Task entry point with 3 execution modes: pair (driver+navigator), solo write, solo diff.
• Task inspection resources under aimux://tasks/{task_id}.
• Compiled read-only recipe discovery under aimux://recipes and invocation via task(recipe_id=...).
• Read-only task list/viewer resources for browser-readable inspection without execution controls.
• Compiled caller guide resources under aimux://guides/caller.

Out of current scope:

• Agent registry execution over MCP.
• Multi-model orchestration tools over MCP.
• Pipeline v5 Layer 5 exposure (beyond the task entry point).
• Mutation-heavy recipe expansion beyond the compiled read-only initial recipes.

Those removed surfaces are not runtime defects in the current build. They are future design work under AIMUX-9 / DEF-1.

Release Gates

Before a release:

1. Build with Go 1.25.10 or newer.
2. Run the full Go test suite.
3. Run the critical suite under tests/critical/.
4. Run go vet, go mod verify, and govulncheck.
5. Walk through docs/PRODUCTION-TESTING-PLAYBOOK.md in customer mode.
6. Verify installed/running binary freshness with upgrade(action="check").
7. Verify local-source install through an MCP client or mcp-launcher -mode install.

License

MIT. See LICENSE.