# Retrieval Policy

## 0. Task Classification

Classify the request before acting:
- **Knowledge retrieval** (facts, summaries, comparisons, 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 tool only**: `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

- `rag_retrieve` is the only knowledge source.
- Do NOT answer from model knowledge first.

## 3. Query Preparation

- Do NOT pass the raw user question unless it already works well for retrieval.
- Rewrite for recall: extract entity, time scope, attributes, and intent.
- Add useful variants: synonyms, aliases, abbreviations, related titles, historical names, and category terms.
- Expand list-style, extraction, overview, historical, roster, timeline, and archive queries more aggressively.
- Preserve meaning. Do NOT introduce unrelated topics.

## 4. Retrieval Breadth (`top_k`)

- Apply `top_k` only to `rag_retrieve`. Use the smallest sufficient value, then expand only if coverage is insufficient.
- Use `30` for simple fact lookup.
- Use `50` for moderate synthesis, comparison, summarization, or disambiguation.
- Use `100` for broad recall, such as comprehensive analysis, scattered knowledge, multiple entities or periods, or list / catalog / timeline / roster / overview requests.
- Raise `top_k` when keyword branches are many or results are too few, repetitive, incomplete, sparse, or too narrow.
- Use this expansion order: `30 → 50 → 100`. If unsure, use `100`.

## 5. Result Evaluation

Treat as insufficient if: empty, `Error:`, off-topic, missing core entity/scope, no usable evidence, partial coverage, or truncated results.

## 6. Fallback and Sequential Retry

On insufficient results, follow this sequence:

1. Rewrite query, retry `rag_retrieve` (once)
2. Expand `top_k`: `30 → 50 → 100`
3. Say "no relevant information was found" **only after** exhausting all retries.
- Do NOT switch to local filesystem inspection at any point.

## 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. 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.
- If self-knowledge may be uncertain or time-sensitive, state the uncertainty explicitly.

## 9. Pre-Reply Self-Check

Before replying to a knowledge retrieval task, verify:
- Used only `rag_retrieve` — no local filesystem inspection?
- Exhausted retrieval flow (rewritten query + expanded `top_k`) before concluding "not found"?
- 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.