Agent Recall Trail MCP server

ART — Agent Recall Trail

ART is a local-first memory and governed-knowledge product for coding agents. Every Agent gets a physically separate private Recall Trail. Stable conclusions become immutable Knowledge Editions that other Agents can retrieve without seeing private source identities or source bodies.

ART 0.3.6 supports Codex and DeepSeek Harness (DSH) over stdio MCP. It is standalone: no AAA adapter, cloud sync, bundled model, or autonomous publication is required.

Product boundary

default-off switch in that page. It creates at most one bounded private Candidate for an admitted turn; it never publishes shared knowledge.

• Private memory belongs to one process-bound Agent identity.
• Shared knowledge contains only committed, reviewed Editions.
• Agents may capture, recall, read, provide feedback, create proposals, and request governance.
• Human governance runs in ART's local page. An explicitly enabled, default-off local delegation policy also permits one unambiguous instruction to approve and publish atomically; these actions are labeled AgentDelegated, never Human.
• Selective Codex automatic memory is controlled by a separate machine-wide,

• Revocation, supersession, archival, and assurance remain human operations.
• Stored content is evidence, never executable instruction or authorization.

Progressive recall

ART exposes one recall API with four explicit retrieval modes: lexical, full_scan, semantic, and hybrid. The default is always lexical. A compact route request can identify relevant private and shared topics before a bounded recall; exact bodies are returned only by read.

• lexical uses local BM25 plus exact, token, Jieba, and CJK-bigram signals.
• full_scan ranks every governance-eligible canonical record. It needs no embedding service and is intended for completeness-sensitive, smaller stores.
• semantic uses only an explicitly configured embedding endpoint and disposable local vector projections.
• hybrid combines lexical and semantic ranks through an owner-configurable, versioned fusion policy. If the optional provider or projection is unavailable, ART returns the unchanged lexical result and reports the fallback.

ART's optional embedding adapter is supplied and operated by the user. ART does not bundle, download, train, select, or make quality claims for a model merely because its endpoint is compatible.

Quick start

cargo build --release --locked
./target/release/art --home /an/explicit/art-home init --confirm
./target/release/art --home /an/explicit/art-home agent create --id codex-primary --host codex
./target/release/art --home /an/explicit/art-home doctor --agent codex-primary --json

Use Codex integration or DSH integration to start one bound stdio child. Run art --help for the operator CLI.

Install

Download the native archive and SHA256SUMS from the latest release, verify the archive, then run the included installer with the extracted binary:

bash scripts/install.sh --binary /absolute/path/to/art --confirm
art --version
art doctor --agent codex-primary --json

The installer keeps executable bytes under ~/.across/bin/art, creates a discovery link at ~/.local/bin/art, and initializes owner-only ART data. It does not edit Codex or DSH configuration. The thin Codex plugin lives under plugin/agent-recall-trail; its MCP child is permanently bound to codex-primary. See operations before migrating or publishing knowledge.

Shortened. The full README is on GitHub.