Pickle-Thinker

OpenCode plugin for GLM-4.6 / Big Pickle that reliably injects the magic keyword Ultrathink so these models consistently enter “thinking mode”.

Two modes (default: tool):

• lite (legacy): prefix only the latest user message.
• tool (recommended): redundancy-first injection so Ultrathink shows up in all the important places (user turns + tool returns).

Configuration

Config lives in ~/.config/opencode/pickle-thinker.jsonc (auto-created) or .opencode/pickle-thinker.jsonc per project:

{
  "enabled": true,
  // "lite" | "tool"
  "mode": "tool",
  // NOTE: `Ultrathink` is the magic word for these models.
  // If you set `prefix` to something else, the plugin still forces `Ultrathink`.
  "prefix": "Ultrathink: ",
  "debug": false,
  // Detect and fix tools that are mistakenly placed within thinking blocks
  "interceptToolsInThinking": true,
  // Target models (substring match)
  "targetModels": [
    "glm-4.6",
    "zai/glm-4.6",
    "zai-coding-plan/glm-4.6",
    "big-pickle",
    "opencode/big-pickle"
  ]
}

Heads-up: tool mode increases turns/tokens and may affect subscription usage.

How It Works

This plugin only activates for the target models (GLM-4.6 + Big Pickle). For those models:

• Every user message is forced to start with Ultrathink (as a dedicated leading text part).
• After tool results, the plugin injects a synthetic user “continue + ultrathink” message so the model can think between tool calls.
• Tool outputs and tool errors are also appended with an Ultrathink block as an extra safety net.
• Session Compaction: When conversations get too long and are summarized, the plugin re-injects instructions to ensure the model stays in thinking mode.

Duplication is intentional; missing Ultrathink is the bug.

Notes on prefix

• Ultrathink is required for GLM-4.6 / Big Pickle to think.
• You can still customize prefix, but the plugin ensures the first token the model sees is Ultrathink.

Installation

Add to your repository opencode.json or user-level ~/.config/opencode/opencode.json:

{
  "plugin": ["@howaboua/[email protected]"]
}

Other installation methods (manual folder installs, submodules) are intentionally unsupported/legacy as of 0.3.0.

Examples

• User turn (forced):

  • First thing the model sees in each user message: Ultrathink

• After any tool result (synthetic interleave turn):

  • Ultrathink about these results. Analyze the output carefully...
  • Ultrathink about these results. Review what was returned...

• Tool output appended (extra safety net):

  • Tool output will also contain an Ultrathink block (with a small marker tag) so even “weird” tool flows still surface the keyword.

Acknowledgments

This plugin was created using the Dynamic Context Pruning plugin by Dan Tarquinen as a template. The DCP plugin provided the excellent fetch wrapper architecture and API format handling that made this implementation possible.