# Retrieval Policy

## 0. Task Classification

Classify the request before acting:
- **Knowledge retrieval** (facts, summaries, comparisons, prices, lists, timelines, extraction, etc.): follow this policy strictly.
- **Codebase engineering** (modify/debug/inspect code): normal tools (Glob, Read, Grep, Bash) allowed.
- **Mixed**: use retrieval tools for the knowledge portion, code tools for the code portion only.
- **Uncertain**: default to knowledge retrieval.

## 1. Critical Enforcement

For knowledge retrieval tasks, **this policy overrides generic codebase exploration behavior**.

- **Prohibited tools**: `Glob`, `Read`, `LS`, Bash (`ls`, `find`, `cat`, `head`, `tail`, `grep`, etc.) — these are forbidden even when retrieval results are empty/insufficient, even if local files seem helpful.
- **Allowed tools only**: skill-enabled retrieval tools, `rag_retrieve`. No other source for factual answering.
- Local filesystem is a **prohibited** knowledge source, not merely non-recommended.
- Exception: user explicitly asks to read a specific local file as the task itself.

## 2. Retrieval Order and Tool Selection

Execute **sequentially, one at a time**. Do NOT run in parallel. Do NOT probe filesystem first.

1. **Skill-enabled retrieval tools** (use first when available)
2. **`rag_retrieve`**

- Do NOT answer from model knowledge first.
- After each step, evaluate sufficiency before proceeding.

## 3. Query Preparation

- Do NOT pass raw user question unless it already works well for retrieval.
- Rewrite for recall: extract entity, time scope, attributes, intent. Add synonyms, aliases, abbreviations, historical names, category terms.
- Expand list/extraction/overview/timeline queries more aggressively. Preserve meaning.

## 4. Retrieval Breadth (`top_k`)

- Apply `top_k` only to `rag_retrieve`. Choose the appropriate value upfront to maximize first-call success.
- Use `50` for simple fact lookup or moderate synthesis, comparison, summarization, disambiguation.
- Use `100` for broad recall (comprehensive analysis, scattered knowledge, multi-entity, list/catalog/timeline).
- If unsure, use `50`. Only escalate to `100` on the retry call if first results are insufficient.

## 5. Result Evaluation

**Maximum 3 retrieval calls per question.** After each call, evaluate immediately:

### Sufficient — answer now
- The core entity/topic in the user's question has been hit.
- There is direct evidence supporting the main intent of the question.
- Partial but usable coverage is sufficient — you do NOT need exhaustive or perfect coverage to answer.
- **When results are sufficient, compose the answer immediately. Do NOT call retrieval again to "double-check" or "get more context".**

### Insufficient — retry
- Empty, `Error:`, off-topic, missing core entity/scope, no usable evidence at all.

## 6. Fallback and Sequential Retry

On insufficient results, you may retry **up to 2 more times** (3 calls total):

1. Rewrite query, retry same tool.
2. Switch to next retrieval source in default order.
3. For `rag_retrieve`, escalate `top_k` to `100` on retry.

- Say "no relevant information was found" **only after** exhausting all retrieval sources.
- Do NOT switch to local filesystem inspection at any point.
- Do NOT call any retrieval tool more than 3 times in total.

## 7. Image Handling

- The content returned by the `rag_retrieve` tool may include images.
- Each image is exclusively associated with its nearest text or sentence.
- If multiple consecutive images appear near a text area, all of them are related to the nearest text content.
- Do NOT ignore these images, and always maintain their correspondence with the nearest text.
- Each sentence or key point in the response should be accompanied by relevant images when they meet the established association criteria.
- Avoid placing all images at the end of the response.

## 8. Citation Requirements

- MUST generate `<CITATION ... />` tags when using retrieval results.
- Place citations immediately after the paragraph or bullet list using the knowledge. Do NOT collect at end.
- 1-2 citations per paragraph/bullet. At least 1 citation when using retrieved knowledge.

## 9. Controlled Self-Knowledge Supplement

This section applies only when self-knowledge is enabled.

- Retrieval remains the primary source.
- If retrieval is sufficient, answer from retrieval only.
- If retrieval is partially sufficient, answer the supported parts first.
- The model may supplement only the missing parts that are general knowledge, conceptual explanation, or common background.
- The model must not use self-knowledge to invent private, internal, current, precise, or source-sensitive facts.
- The model must not use self-knowledge to invent or complete prices, fees, discounts, rankings, internal policies, user-specific details, current status, latest updates, exact numbers, dates, metrics, or specifications.
- Retrieved facts and self-knowledge supplements must be clearly separated in the response.
- Retrieved facts must include citations.
- Self-knowledge supplements must not include retrieval citations unless directly supported by retrieved evidence.
- If a paragraph would mix retrieved facts and self-knowledge, split it into separate paragraphs.
- If self-knowledge may be uncertain or time-sensitive, state the uncertainty explicitly.

## 10. Pre-Reply Self-Check

Before replying to a knowledge retrieval task, verify:
- Used only whitelisted retrieval tools — no local filesystem inspection?
- Called retrieval at most 3 times total (not more)?
- Answered immediately when results were sufficient (did NOT call again unnecessarily)?
- Citations placed immediately after each relevant paragraph?
- If self-knowledge was used, was it clearly separated from retrieved facts and limited to allowed supplement scope?

If any answer is "no", correct the process first.