@fazaboa/opencode-auto-continue

opencode-auto-continue

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An OpenCode plugin that automatically continues responses cut off by the model's output limit.

The problem

Large-context models sometimes stop mid-answer — the response gets truncated by the output token cap (or the model enters a long reasoning loop and hits it), leaving you with half a file, a broken diff, or an unfinished explanation. You then have to type "continue" manually… over and over.

If you've experienced this, you know exactly how annoying it is:

The solution

This plugin watches your session from the outside. When the assistant's last message:

• ends with finish: "length" / a MessageOutputLengthError, or
• crosses a soft limit of output tokens (~88% of the cap),

it automatically injects a continuation prompt telling the model to pick up exactly where it left off — no repetition.

Guardrails

Guardrail	Default
Max auto-continues per user turn (anti infinite-loop)	3
Counter resets when you send a new message	✓
Soft limit well below the cap (catches "finished but glued to the cap")	115k tokens
Silent failure (never breaks your session)	✓

Install

npm install @fazaboa/opencode-auto-continue

Then register it in your opencode.json:

{
  "plugin": ["@fazaboa/opencode-auto-continue"]
}

Or drop the source file directly into .opencode/plugins/auto-continue.ts in your project — it's a single self-contained file.

Configuration (optional)

{
  "plugin": [
    [
      "opencode-auto-continue",
      {
        "outputSoftLimit": 115000,
        "maxAutoContinues": 3,
        "continueText": "[auto-continue] Continue exactly where you left off."
      }
    ]
  ]
}

Option	Type	Default	Description
outputSoftLimit	number	115_000	Output-token threshold that triggers a continue
maxAutoContinues	number	3	Max continuations per user turn
continueText	string	(see source)	The prompt injected on continue

Programmatic usage:

import { autoContinue } from "@fazaboa/opencode-auto-continue"

export const AutoContinuePlugin = autoContinue({ maxAutoContinues: 5 })

How it works

1. Listens for OpenCode events.
2. On session.idle, fetches the session's messages via the SDK client.
3. Checks the last assistant message for truncation (finish === "length" / MessageOutputLengthError) or output tokens ≥ soft limit.
4. If triggered, sends a promptAsync with the continuation text and increments the per-session counter.
5. A new user message resets the counter.

License

MIT