Bailian web search routing (bailian-web-search)

CRITICAL — Before executing, MUST read the shared protocol in [../bailian-protocol/SKILL.md](../bailian-protocol/SKILL.md): Provider selection and consent, Version & updates (pre-flight checklist), Setup & auth, and CLI errors: report an issue. If that protocol file is missing, stop and run bl skill init; do not guess auth/consent.

Scope: model-aware routing for web search inside Agent-driven bl workflows — this skill owns the routing decision only.
Command flags / usage / examples: Read skill bailian-cli reference if installed; else bl search web --help / bl text chat --help — do not guess flags.

Install (supported): bl skill init

Token Plan keys do not authorize Bailian MCP search — never route them to bl search web.

Routing workflow

Step 1 — Identify the active model identity

Run (no auth needed):

bl config show --output json

Treat the connection as Token Plan when either condition holds — this mirrors the CLI's own endpoint detection (usesTokenPlanEndpoint), so routing stays consistent with command behavior:

• config (active profile name) is token-plan, or
• the hostname of base_url matches token-plan.<region>.maas.aliyuncs.com (e.g. https://token-plan.cn-beijing.maas.aliyuncs.com).

Do not rely on the profile name alone: users can create additional Token Plan profiles under custom names, and only the Base URL host check catches those. Anything else → default identity.

Step 2 — Route by identity

User override: if the user names a specific path or command, follow it except under Token Plan identity: do not call bl search web even if the user asks for MCP — explain that Token Plan keys cannot authorize Bailian MCP search, then use the model-native path (or ask once whether to switch profile / key).

Model-native path (Token Plan preferred / fallback target)

bl text chat --api responses --tool '{"type":"web_search"}' --message "搜索近期的阿里云新闻"

• The Responses API enables native web search via the tool definition {"type":"web_search"}.
• Requires a model with native web search support (Qwen3.7+). Do not hardcode --model: omit it so the CLI uses defaulttextmodel / built-in default; only pass --model when the user named one.
• Write --message in the user's language; the reply language follows the prompt (see bailian-protocol → Respond in the user's language).
• Flags / usage: Read skill bailian-cli if installed, else bl text chat --help.

MCP path (default)

bl search web --query "阿里云百炼最新功能"

• Requires the WebSearch MCP to be activated for the current key; on the not-activated error the CLI appends an activation hint with the marketplace URL — relay it to the user.
• Flags / usage: Read skill bailian-cli if installed, else bl search web --help.

Fallback (MCP → model-native, exactly once)

Do not fall back on every non-zero exit. Fall back only when bl search web fails for one of these classes (match stderr / message):

• auth / permission — key not valid for the MCP service (e.g. Token Plan key misrouted by identity detection),
• MCP not activated — MCP request failed: 404 with 未开通 / MCP不存在 / MCPISINVALID (CLI may append an activation hint),
• MCP transport — 405 / Streamable-HTTP unsupported, or clear network / timeout / DNS failures reaching the MCP endpoint.

Do not fall back for: missing --query / USAGE errors, rate limits, content-policy / business errors from a successful MCP session, or empty-but-successful result sets. Report those verbatim and stop (or ask the user); do not burn a Responses call.

Fallback discipline:

1. Re-issue the same query via the model-native path (omit --model unless the user named one).
2. If the fallback succeeds, tell the user the MCP path failed and — when the not-activated hint appeared — that activating the WebSearch MCP restores the default path.
3. If the fallback also fails, stop and report both errors verbatim; follow the issue-reporting flow in bailian-protocol (ask once). Never loop retries.

Quick examples

# Step 1: identify the active model identity
bl config show --output json

# Token Plan identity → model-native web search (no --model unless user named one)
bl text chat --api responses --tool '{"type":"web_search"}' --message "搜索近期的阿里云新闻"

# Default identity → Bailian MCP search
bl search web --query "阿里云百炼最新功能"

# Eligible MCP failure → fall back once (same rule: no hardcoded --model)
bl text chat --api responses --tool '{"type":"web_search"}' --message "阿里云百炼最新功能"

Routing reminders

• Generic web research the host can do, ordinary Q&A, coding, writing → host-first; do not invoke bl (class 1 in bailian-protocol). Route only when the user names Bailian / DashScope / bl or continues an existing bl workflow (class 4).
• Knowledge-base / RAG over Bailian corpora → hub skill bailian-cli (bl knowledge), not this skill.
• Summarize search results in the user's language; on the model-native path the CLI injects no default language — if a fixed language is required, pass --system in that language (do not hardcode 简体中文).
• Other Bailian workflows (apps / usage / config) → hub skill bailian-cli; media generation → bailian-gen; fine-tuning → bailian-finetune; agents.yaml → bailian-managed-agent. Soft hand-off by skill name: Read if installed, else bl … --help or prompt bl skill init.

references

• [bailian-protocol](../bailian-protocol/SKILL.md) — shared protocol (install via bl skill init)
• skill bailian-cli — hub command reference for bl search web / bl text chat (soft hand-off; fallback: --help)