feat(flare-proxy): add Cline/ClinePass api.cline.bot provider support

[getappz]

Added Cline/ClinePass (api.cline.bot) provider support to flare-proxy, verified against the OmniRoute reference checkout in .refs/omniroute (tests/snapshots/provider/translate-path.json:1071-1152).

Registry (registry/providers.toml): new cline (CLINE_API_KEY) and clinepass (CLINEPASS_API_KEY) entries — openai_compatible, base_url https://api.cline.bot/api/v1, extra headers HTTP-Referer: https://cline.bot + X-Title: Cline mirroring the real Cline client.

Stream translation (shape_xlat.rs + forward.rs): two api.cline.bot quirks handled:

• content/delta.content arriving as an array of Anthropic-style text blocks instead of a bare string (OmniRoute #5559) — new content_text() helper used by openai_chunk_to_anthropic_sse, chat_to_messages, and the heuristic accumulation in forward.rs.
• Responses wrapped in {success, data:{...}} envelope (OmniRoute #6046) — unwrap_success_envelope() applied per SSE chunk in stream_translated_sse.

Tests: +4 (streaming content-array delta, chat_to_messages content-array, envelope unwrap, cline/clinepass registry resolve with headers); extended the broad openai_compatible registry coverage list.

Verification: cargo test -p flare-proxy 98 passed / 0 failed; cargo fmt --all -- --check clean; cargo clippy -p flare-proxy --all-features -- -D warnings clean.

Usage: MODEL=cline/... or MODEL=clinepass/... with the matching env key. No free tier (paid-key/account provider), so no quota metadata.

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Opened by opencode on flared:c997d745ae66 for item #516 via agentflare.

Summary by CodeRabbit

• New Features
  • Added Cline and ClinePass as OpenAI-compatible providers.
  • Added support for Cline API authentication, endpoint configuration, and required request headers.
• Bug Fixes
  • Improved compatibility with Cline responses, including success envelopes and array-form text content.
  • Enhanced streaming response translation and content handling.
• Tests
  • Added coverage for provider configuration, headers, response formats, and envelope handling.

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📥 Commits

Reviewing files that changed from the base of the PR and between c311879 and 7a88a5d.

📒 Files selected for processing (5)

• crates/flare-proxy/src/forward.rs
• crates/flare-proxy/src/providers/cline_login.rs
• crates/flare-proxy/src/providers/mod.rs
• crates/flare-proxy/src/shape_xlat.rs
• scripts/clinepass-proxy.ps1

📝 Walkthrough

Walkthrough

The proxy adds cline and clinepass providers for Cline’s OpenAI-compatible API. It unwraps Cline success envelopes and supports string or text-block-array content in message and streaming translation.

Changes

Cline provider integration

Layer / File(s)	Summary
Register Cline providers crates/flare-proxy/registry/providers.toml, crates/flare-proxy/src/providers/registry.rs	The registry adds cline and clinepass with distinct API-key variables, the shared Cline endpoint, and required headers. Tests validate provider resolution and configuration.
Normalize Cline payloads crates/flare-proxy/src/shape_xlat.rs	Translation helpers support string and text-block-array content and unwrap successful {success, data} envelopes. Tests cover message content, stream deltas, and envelope handling.
Apply normalization in SSE forwarding crates/flare-proxy/src/forward.rs	The SSE loop unwraps provider payloads, accumulates normalized content, and passes owned payloads to translation and stream-finalization callbacks.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: 🟡 Moderate · up to c3118

Cline error envelopes with success:false can currently be treated as successful responses, producing incomplete or invalid streamed output for users. The boolean check should be corrected before merging.

Sequence Diagram(s)

sequenceDiagram
  participant Client
  participant flare_proxy
  participant ClineAPI
  participant shape_xlat

  Client->>flare_proxy: OpenAI-compatible request
  flare_proxy->>ClineAPI: Forward request with Cline headers
  ClineAPI-->>flare_proxy: SSE success envelope
  flare_proxy->>shape_xlat: Unwrap payload and normalize content
  shape_xlat-->>flare_proxy: Translated stream chunk
  flare_proxy-->>Client: OpenAI-compatible SSE response

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Possibly related PRs

• getappz/agentflare#261: Introduced related flare-proxy provider registry and streaming translation changes.
• getappz/agentflare#439: Introduced the registry-driven OpenAI-compatible provider system used by this change.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the addition of Cline and ClinePass provider support for flare-proxy, which is the primary change.
Description check	✅ Passed	The description explains the changes, rationale, tests, verification, usage, and compatibility risks, although it does not use the template headings or checkboxes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Inline comments:
In `@crates/flare-proxy/src/shape_xlat.rs`:
- Around line 286-291: Update unwrap_success_envelope to unwrap data only when
success is explicitly true and data is an object; otherwise return the original
value. Add a regression test covering success: false with object data, while
preserving the existing non-object data behavior.

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[getappz]

Added a follow-up: Cline CLI login auto-detect. When CLINE_API_KEY/CLINEPASS_API_KEY is unset, the proxy now reads the access token the Cline CLI already stored in ~/.cline/data/settings/providers.json (providers.{cline,cline-pass}.settings.auth), so users logged into the Cline CLI get working credentials with zero config. Expired tokens (past expiresAt) fall through to a "run the cline CLI to sign in" hint. New providers/cline_login.rs module + 4 unit tests; 102 tests pass, fmt + clippy clean.

[getappz]

Follow-up: self-refreshing tokens (commit edbd6b2). Live testing surfaced a real gap — the Cline CLI refreshes its OAuth token in-memory and only writes providers.json at login/config-change, so the persisted token expires within ~1h. cli_credential() now:

• Reads the stored token; if within the 5-min refresh buffer, calls api.cline.bot/api/v1/auth/refresh with the exact payload from the cline/cline SDK ({"refreshToken", "grantType":"refresh_token"} — verified from sdk/packages/core/src/auth/cline.ts).
• Caches the refreshed token in-process so a long-running proxy doesn't re-refresh per request, and never writes back to the CLI's file (avoids clobbering a live CLI session).

Status: 103 tests pass, fmt + clippy clean. Live refresh validation is pending — the account hit its ClinePass usage limit mid-test, and the persisted cline-pass token is expired while the running CLI works off an in-memory refresh, so the endpoint currently answers every request with a generic 400. Will validate end-to-end once the limit clears.