cxc-search

# search — Unified Search Hub Search discipline for any lookup that leaves the repository. This skill is implicit-visible as metadata (`allow_implicit_invocation: true`); load the full body on explicit trigger or `dev`-hub routing, never by an external dispatcher. ## Source-Proof Invariant (read first) Search results are **candidate URLs, not evidence.** Snippets, summaries, and search-result consensus discover where a fact might live; they never settle it. When recency, factual accuracy, version/compatibility, or source attribution matters, open the original page and confirm it before you treat the answer as sufficient. This invariant precedes every sufficiency rule below — no tier may declare an answer final on snippet text alone. ## The Ladder (exactly three codex-native tiers) ### Research-depth classifier (SEARCH-DEPTH-01) Before climbing the ladder, name the depth — it is distinct from the target classifier in the Korean Intent Guard (which picks web vs docs vs repo): - **latest/current fact** — one entity, a version/date/price/status. Tier 1 discover + Tier 2 open one primary source. Capture the exact date. - **official-doc fact** — API/library behavior. Prefer official docs first, then open for proof. - **implementation/source fact** — how something is built. Open the source/repo, not a summary. - **comprehensive research** — multi-source/contested. This is the only depth that justifies Tier 3 ([Deep research](references/deep-research.md)); ordinary latest/current lookups never auto-escalate to a subagent swarm. ## Target routing Classify external/public/current information, official-doc behavior, or this repository's code/logs/config before choosing tools; system comprehension routes to `cxc-dev-debugging`. Before querying, read [Korean Intent Guard](references/intent-guard.md) and [query rewrite](references/query-rewrite.md). ## Conditional References | Condition | Reference | | --- | --- | | Before every query | [Korean Intent Guard](references/intent-guard.md), [query rewrite](references/query-rewrite.md) | | Discovering candidate URLs (Tier 1) | [Hosted discovery](references/hosted-discovery.md) | | Opening a source to settle a claim (Tier 2) | [Source-open proof](references/source-open-proof.md) (SEARCH-BROWSE-01) | | Blocked, JS, PDF or table source | [Blocked-URL reader](references/blocked-url-reader.md) | | Explicit deep-research request or host mode (Tier 3) | [Entry boundaries](references/deep-research-entry.md), then [Deep research](references/deep-research.md) | | Any search subagent, including audit/reviewer or Luna lanes | [Skill attachment](references/subagent-attachment.md) (SEARCH-ATTACH-01) | | PABCD divergence candidates | [Candidate grounding](references/divergence-grounding.md) | | Luna discovery or assessing available backends | [Discovery boundaries](references/discovery-boundaries.md) | | Host/tool capability or search integration questions | [Tool notes](references/tool-notes.md) | ## When to stop Stop escalating when any holds: a sufficient primary source is found and confirmed; all candidate URLs are dead or unreachable; or the task needs a user clarification. Do not keep climbing tiers past a confirmed answer, and do not spend Tier 3 subagents on a question Tier 1+2 already settled.