plastic-labs/opencode-honcho

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# Honcho Plugin for Opencode > Add AI-native memory to OpenCode Give OpenCode long-term memory that survives context wipes, session restarts, and fresh chats. Honcho remembers what you're working on, durable preferences, and prior context across your projects. ## Quick Start ### Step 1: Get Your Honcho API Key 1. Go to **[app.honcho.dev](https://app.honcho.dev)** 2. Sign up or log in 3. Copy your API key ### Step 2: Install the Plugin The plugin supports OpenCode 2.x and 1.x from one package. OpenCode installs it and adds it to your global OpenCode config. OpenCode 2.x (`@opencode/cli`): ```bash opencode plugin add "@honcho-ai/opencode-honcho" ``` OpenCode 1.x: ```bash opencode plugin "@honcho-ai/opencode-honcho" --global ``` To update an existing install, run `opencode plugin update` (2.x) or `opencode plugin "@honcho-ai/opencode-honcho" --force` (1.x). If you edit the config by hand instead, the key is `plugins` on 2.x and `plugin` on 1.x, both taking `"@honcho-ai/opencode-honcho"` as an entry. Existing installs keep **directional** observation until you choose. After updating, OpenCode prompts you to keep directional or switch to unified (also via `/honcho:setup` or `/honcho:config`). If you switch to unified, you can optionally run `/honcho:import` to reingest local OpenCode transcripts into the new collection. This command expects the `opencode` CLI to already be installed and available on your `PATH`. If your shell cannot find `opencode`, restart your shell or source your shell config and run the command again. ### Step 3: Run Setup in OpenCode 1. Start OpenCode 2. Run `/honcho:setup` 3. Keep the default `Honcho Cloud` option unless you explicitly want a self-hosted or local endpoint 4. Enter your Honcho API key 5. Enter your `peerName` 6. Run `/honcho:status` to verify the runtime 7. If you are upgrading an existing install, choose directional vs unified when prompted. After switching to unified, optionally run `/honcho:import` to backfill local history ## What You Get - **Persistent Memory** - OpenCode can retain durable context across sessions - **Hook-Driven Memory** - Hooks inject memory into the prompt and record significant tool activity, so recall works regardless of the model - **Honcho Memory Skill** - A `honcho-memory` skill is installed into OpenCode's skills directory so the agent knows when to pull and save memory on its own - **Cloud or Local Deployments** - Use Honcho Cloud or point at a self-hosted or local Honcho instance - **Workspace Mapping** - OpenCode projects map to Honcho workspaces - **Session Mapping** - Sessions can be scoped per directory, repo, branch, chat instance, or globally - **Durable Writes** - Honcho can retain stable conclusions and session context - **Memory Retrieval** - Search memory, query Honcho knowledge, and inject relevant context into prompts - **Peer Modeling** - User and root-agent observation flags are configurable (`observationMode`, `agentObserveMe`) ## Installation Output OpenCode: - registers `@honcho-ai/opencode-honcho` with OpenCode - resolves the package's native server and TUI plugin targets - updates plugin entries in your global OpenCode config - activates the plugin globally for all OpenCode projects ## Configuration OpenCode Honcho configuration lives in: - `~/.honcho/config.json` OpenCode reads and writes this shared config file directly. OpenCode-specific defaults live under `hosts.opencode` in that file. ```jsonc { "apiKey": "hch-...", "peerName": "user", "baseUrl": "https://api.honcho.dev", "hosts": { "opencode": { "workspace": "opencode", "aiPeer": "opencode", "recallMode": "hybrid", "observationMode": "unified", // new installs; existing configs without this field stay directional "agentObserveMe": false, // true opts into self-observation on the root agent peer "sessionStrategy": "per-directory", "removeUserPrefix": true, // true uses the bare peerName; false (default on upgrade) keeps the legacy user-<peerName> peer "apiKey": "hch-..." // optional; overrides the root apiKey for this host } } } ``` ### Cloud vs Local For Honcho Cloud: - `apiKey` is required - `baseUrl` should remain `https://api.honcho.dev` For self-hosted or local Honcho: - `baseUrl` should point to your deployment, for example `http://127.0.0.1:8000` - `apiKey` is required only if that deployment requires authentication If OpenCode is running in Docker or another remote environment, `localhost` may not refer to your machine. The configured `baseUrl` must be reachable from the OpenCode host runtime. ### Session Strategies | Strategy | Behavior | Best for | | --- | --- | --- | | `per-directory` | One session per working directory | Default project memory | | `per-repo` | One session per repository | Repos with multiple entry directories | | `git-branch` | Session changes with the current branch | Branch-specific workflows | | `per-session` | New session for each OpenCode session id | Short-lived isolated work | | `chat-instance` | Session follows the current chat instance | Highly ephemeral usage | | `global` | One session for everything | Shared memory across all work | ### Observation Mode Controls which Honcho collection `honcho_chat`, `honcho_create_conclusion`, and targeted prompt recall use for the user. This is independent of `agentObserveMe` (whether the agent peer is modeled). Changing modes does not migrate existing conclusions — use `/honcho:import` to backfill local OpenCode transcripts so Honcho can derive into the new collection. | Mode | Collection | Best for | | --- | --- | --- | | `unified` (default on new installs) | The user's self-collection (`observer=user`, `observed=user`) | Shared workspaces where multiple agents should recall each other's conclusions about the user | | `directional` (existing installs until set) | This AI peer's view of the user (`observer=aiPeer`, `observed=user`) | Isolated per-agent memory; previous OpenCode behavior | New `~/.honcho/config.json` files stamp `observationMode: "unified"`. Configs that predate the field keep **directional** so an upgrade does not orphan already-derived memory. After updating, OpenCode prompts you to keep directional or switch to unified (`/honcho:setup`, `/honcho:config`, or the TUI launch dialog). If you switch, optionally run `/honcho:import` to reingest local OpenCode transcripts: ```json { "hosts": { "opencode": { "observationMode": "unified" } } } ``` ### Agent self-observation The root agent peer is created with `observeMe: false` by default: Honcho models the user, not the assistant. Set `agentObserveMe` to `true` if you want a peer card / representation of the agent itself. ```json { "hosts": { "opencode": { "agentObserveMe": true } } } ``` ## Operator Commands | Command | Description | | --- | --- | | `/honcho:setup` | First-time setup for cloud or local Honcho | | `/honcho:status` | Show effective Honcho status for the current OpenCode project, including live workspace and session names when available | | `/honcho:settings` | Show effective config values and config paths | | `/honcho:config` | Edit shared Honcho fields in `~/.honcho/config.json` | | `/honcho:import` | Preview or import your local OpenCode session history into Honcho | ### Importing local history `/honcho:import` reads session history through the OpenCode SDK client that the plugin receives, maps sessions with the same `sessionStrategy` as live capture, and uploads user/assistant text with original timestamps. - First call (or the TUI preview) is a dry run — it does not upload. - Confirming sends conversation content to Honcho. Already-imported sessions are skipped (`~/.honcho/opencode-import-state.json`). - After switching an existing install to `observationMode: "unified"`, import so past transcripts can be derived into the user self-collection instead of remaining only on the old directional pair. ## Agent Tools The plugin exposes these tools inside OpenCode: | Tool | Description | | --- | --- | | `honcho_setup` | Validate setup and persist shared credentials or endpoint settings | | `honcho_status` | Show effective runtime status | | `honcho_get_config` | Read effective and persisted settings | | `honcho_set_config` | Update a persisted shared setting | | `honcho_search` | Search Honcho session messages in the current session | | `honcho_chat` | Query Honcho for reasoning-backed context (observer follows `observationMode`) | | `honcho_create_conclusion` | Save a durable memory conclusion (same observer as `honcho_chat`) | ## Plugin Surfaces One `./server` entry serves both OpenCode generations: 1.x calls its `server()` hook map, 2.x reads its `id` and `setup()`. | Purpose | OpenCode 1.x | OpenCode 2.x | |---|---|---| | Capture the user turn, fetch prompt-specific recall | `chat.message` | `session.hook("prompt")` | | Memory instruction + stable snapshot (+ recall on 2.x) | `experimental.chat.system.transform` | `session.hook("context")` | | Continuity block during compaction | `experimental.session.compacting` | `session.hook("compaction")` | | Record significant tool activity | `tool.execute.after` | `tool.hook("execute.after")` | | `HONCHO_*` variables for shell tools | `shell.env` | `shell.hook("create.before")` | | `honcho_*` tools | `tool` | `tool.transform` | | Session start, assistant capture, cleanup | `event` | `event.subscribe()` (`session.created`, `session.text.ended`, `session.step.ended`, `session.execution.*`, `session.deleted`) | On 2.x, prompt-specific recall rides in the request context instead of a synthetic message part, because 2.x persists prompt-hook edits as the user's message. ### How hooks drive memory - `experimental.chat.system.transform` always appends the Honcho memory instruction. With `recallMode` `hybrid` or `context` it also adds a stable memory snapshot (user profile, agent context, session summary), captured once on the first turn of a session. - `chat.message` retrieves prompt-specific recall on user turns in `hybrid` and `context` mode, appending a synthetic memory part when it yields a new block. Unchanged blocks are deduplicated within the session. In `tools` mode nothing beyond the instruction is injected; the model reaches memory only through the `honcho_*` tools. - `tool.execute.after` records shell commands, file edits, and delegated tasks to the session. Read-only and trivial calls are skipped. Shell arguments that may carry credentials are redacted, keeping only the executable name. - On session start and after `honcho_setup`, the packaged `honcho-memory` skill is copied to `~/.config/opencode/skills/honcho-memory`, or `$OPENCODE_CONFIG_DIR/skills/honcho-memory` when set. An unchanged file is left untouched. ## Development For macOS/Linux local branch testing: ```bash bun install bun run build ``` On OpenCode 1.x, register the checkout with the CLI: ```bash opencode plugin "$PWD" --global --force ``` On OpenCode 2.x, `opencode plugin add` only accepts npm or Git package specifiers, so point the `plugins` key in `~/.config/opencode/opencode.json` at the checkout instead: ```jsonc { "plugins": ["/absolute/path/to/opencode-honcho"] } ``` OpenCode 2.x resolves a local plugin directory by its root `server` and `tui` modules rather than the `exports` map, so the checkout ships `server.js` and `tui.js` shims that re-export `dist/`. Run `bun run build` before starting OpenCode. To test the packed tarball on 2.x, unpack it and point `plugins` at the unpacked directory; `plugin add` does not take tarballs. Plugin logs go to stderr on 2.x (`opencode run --standalone --print-logs`) and to OpenCode's log under `service=opencode-honcho` on 1.x.

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honcho-memory

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Persistent cross-session memory via Honcho — recall what you know about the user before working, and save durable insights after.

Quellsprache: Englisch

2026-09-08

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