hashpress-opencode

OpenCode plugin that replaces the default compaction user prompt with a structured continuation handoff:

• OpenCode anchored merge — re-injects <previous-summary> on repeated compacts
• Transponder / hashpress ledgers — Pickup State, Artifact Trail, Rules, Plans, Promises, decisions+why, verbatim literals
• Tail-evidence digest — OpenCode's summarizer only sees the session head; the newest turns are excluded from its input. The plugin digests those excluded turns into a bounded <recent-evidence> block marked authoritative for status, so a ship/release that happened in the tail flips blocked→done instead of going stale.

Does not set or override agent.compaction.model. Configure the compaction model in opencode.json as usual.

Before request lowering, the plugin also repairs malformed cross-provider tool-call IDs that contain a valid OpenAI Responses �fc_...� ID but exceed its 64-character �call_id� limit. It changes only OpenCode's cloned request history, not persisted session messages; unknown ID formats are left untouched.

Install

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": ["hashpress-opencode"],
  "agent": {
    "compaction": {
      "model": "your/preferred-compaction-model"
    }
  }
}

OpenCode installs npm plugins automatically on startup.

Options

{
  "plugin": [
    [
      "hashpress-opencode",
      {
        "extraContext": ["## Swarm\n- preserve bead IDs"],
        "disabled": false
      }
    ]
  ]
}

| Option | Default | Meaning | |--------|---------|---------| | disabled | false | Skip prompt replacement | | extraContext | [] | Extra strings appended after the template (merged with other plugins' output.context) |

Local / file URL (dev)

{
  "plugin": ["file:///Users/you/__devlocal/hashpress-opencode/dist/index.js"]
}

bun install
bun run build

What it changes

Hooks experimental.session.compacting and sets output.prompt to a markdown checklist the compaction agent must fill:

1. Objective
2. Pickup State (cwd, branch, task, next command, active files, tests, caveats)
3. Important Details (constraints, decisions and why, exact literals)
4. Artifact Trail (created / modified / examined)
5. Rules and Invariants
6. Plans and Task State
7. Promises
8. Work State (completed / active / blocked / ruled out)
9. User Messages
10. Next Move

On later compacts, the plugin loads the last finished compaction summary via client.session.messages and wraps it in <previous-summary> so the model merges instead of rewriting from scratch.

What it does not do

• Does not pick a summarizer model (use agent.compaction.model)
• Does not force JSON-schema tool output (OpenCode's hook only replaces prompt text)
• Does not rehydrate verbatim transcript spans (that needs Transponder's bridge pipeline)

Develop

bun install
bun test
bun run build

License

MIT