pi-model-sysprompt-appendix0.1.2

Add model-specific content to Pi system prompt as a model_context section

w-winter Published 10 days ago MIT ~256 downloads/mo

Untested on omp

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Model system-prompt appendix for Pi (`pi-model-sysprompt-appendix`)

Adds a per-model "appendix" to Pi's system prompt as a <model_context> section.

Useful for model-specific calibration (e.g. adding model-targeted rules or identity steering).

Install

From npm:

pi install npm:pi-model-sysprompt-appendix

From the dot314 git bundle (filtered install):

Add to ~/.pi/agent/settings.json (or replace an existing unfiltered git:github.com/w-winter/dot314 entry):

{
  "packages": [
    {
      "source": "git:github.com/w-winter/dot314",
      "extensions": ["extensions/model-sysprompt-appendix/index.ts"],
      "skills": [],
      "themes": [],
      "prompts": []
    }
  ]
}

Configuration

Edit ~/.pi/agent/extensions/model-sysprompt-appendix/model-sysprompt-appendix.json.

Fields

Field	Type	Description
`includeModelLine`	`boolean` (optional)	If `true` and the current model has an `exact` match, adds an `Active model: provider/id` line before the appendix content. Default: `false`.
`default`	`string` (optional)	Appendix text for models not listed in `exact`. Ignored if an exact match exists for the current model.
`exact`	`object` (optional)	Map of `provider/model-id` keys to model-specific appendix text. Takes priority over `default`.

Example

{
  "includeModelLine": true,
  "default": "Always use `trash` instead of `rm` for deletions.",
  "exact": {
    "anthropic/claude-opus-4-5": "You are Opus 4.5.",
    "anthropic/claude-sonnet-4-0": "You are Sonnet 4.0."
  }
}

How this works

With the config above:

Opus 4.5 (anthropic/claude-opus-4-5) gets:

# Model Context
Active model: anthropic/claude-opus-4-5
You are Opus 4.5.

Sonnet 4.0 (anthropic/claude-sonnet-4-0) gets:

# Model Context
Active model: anthropic/claude-sonnet-4-0
You are Sonnet 4.0.

Any other model gets:

# Model Context
Always use `trash` instead of `rm` for deletions.

Important: default is only used when there's no exact match. If you want a model to have both specific content AND the default content, include the default text in the exact match value itself.

Usage

Command: /model-sysprompt-appendix reload
Command: /model-sysprompt-appendix status

Changes apply on the next agent turn (the appendix is injected on before_agent_start).