# Summarizer Plugin
Summarizes long text content using an LLM (OpenAI supported). Applies to resource content and tool outputs when they exceed a configurable length threshold.
Hooks
- resource_post_fetch
- tool_post_invoke
Configuration (example)
```yaml
- name: "Summarizer"
kind: "plugins.summarizer.summarizer.SummarizerPlugin"
hooks: ["resource_post_fetch", "tool_post_invoke"]
mode: "permissive"
priority: 170
config:
provider: "openai"
openai:
api_base: "https://api.openai.com/v1"
api_key_env: "OPENAI_API_KEY"
model: "gpt-4o-mini"
temperature: 0.2
max_tokens: 512
use_responses_api: true # default: use the Responses API
anthropic:
api_base: "https://api.anthropic.com/v1"
api_key_env: "ANTHROPIC_API_KEY"
model: "claude-3-5-sonnet-latest"
max_tokens: 512
temperature: 0.2
prompt_template: |
You are a helpful assistant. Summarize the following content succinctly
in no more than {max_tokens} tokens. Focus on key points, remove
redundancy, and preserve critical details.
include_bullets: true
language: "en" # null to let the model pick
threshold_chars: 800 # only summarize when input >= this length
hard_truncate_chars: 24000
tool_allowlist: ["search", "retrieve"] # optional: restrict by tool
resource_uri_prefixes: ["http://", "https://"] # default: restrict to web URIs
```
Environment
- Set the OpenAI API key via `OPENAI_API_KEY` (or change `api_key_env`).
- For Anthropic, set `ANTHROPIC_API_KEY`.
Providers
- OpenAI (default): Uses the Responses API by default (`use_responses_api: true`). To switch back to Chat Completions, set it to `false`.
- Anthropic: Set `provider: "anthropic"` and ensure `ANTHROPIC_API_KEY` is configured. Adjust `anthropic.model`, `max_tokens`, and `temperature` as needed.
Notes
- Input is truncated to `hard_truncate_chars` before sending to the LLM to constrain cost.
- Summaries replace the text field (for `ResourceContent.text` and plain string tool results).
Notes
- The plugin truncates input to `hard_truncate_chars` before calling the LLM.
- Summaries replace the text field (for `ResourceContent.text` and plain string tool results).
