Expose a minimal transport-independent Rust search feature

[konard]

Summary

Fixes #148.

• adds a minimal search feature for provider URL construction, response parsing, and caller-owned transport
• moves the CLI, server, reqwest client, and browser stack behind the default runtime feature so existing consumers retain current behavior
• keeps search_with_transport runtime-independent and gates only the reqwest convenience implementation behind runtime
• adds CI coverage that rejects browser-commander, reqwest, Tokio, Axum, and openssl-sys from the minimal normal dependency graph
• adds a JavaScript parity regression for the same transport-independent URL/parser boundary
• documents the downstream Cargo configuration

Root cause and reproduction

Every Rust dependency and module was unconditional. As a result, even consumers that only called the pure search URL/parser API selected the complete service and browser graph, including native TLS and openssl-sys.

Before the fix, the new dependency-boundary check against --no-default-features --features search reported:

Minimal Rust search feature selected forbidden packages: axum, browser-commander, openssl-sys, reqwest, tokio

The feature-only smoke test now compiles the public URL/parser API and search_with_transport with a caller-owned transport. The dependency check inspects normal Cargo edges, matching what downstream applications compile while excluding test-only dependencies.

Validation

• cargo test --all-features (273 passed)
• cargo test --no-default-features --features search --test search_feature (1 passed)
• cargo test --no-default-features
• cargo check --all-targets --all-features
• cargo clippy --all-targets --all-features -- -D warnings
• cargo fmt --all -- --check
• node scripts/rust-check-search-feature.mjs
• node scripts/check-js-rust-parity.mjs
• npm test -- --runInBand tests/unit/search.test.js (21 passed)
• npm run check
• cargo package --list
• fresh lockfile resolution followed by all-target checks and the complete Rust test suite (273 passed)
• git diff --check

Screenshots

Not applicable; this is a Rust feature/dependency boundary change with no visual UI impact.

[konard]

Working session summary

Implemented and finalized PR #150.

• Added minimal Rust search feature without browser, reqwest, Tokio, Axum, or OpenSSL dependencies.
• Preserved existing behavior behind the default runtime feature.
• Added Rust dependency-boundary and smoke tests plus JavaScript parity coverage.
• Updated documentation and CI enforcement.
• Rust suite: 273 tests passed.
• All current-SHA GitHub workflows pass.
• PR is ready, mergeable, synchronized with main, and the working tree is clean.

Final commit: 4922a6a66932d0a7bc385ee32b00d29cb2038135.

💰 Cost estimation:

• Model: GPT-5.6 Sol
• Provider: OpenAI
• Public pricing estimate: $28.160223

📊 Context and tokens usage:

• 522.4K / 200K (261%) input tokens, 53.5K / 128K (42%) output tokens

Total: (522.4K + 20.5M cached) input tokens, 53.5K output tokens, $28.160223 cost

---

This summary was automatically extracted from the AI working session output.

[konard]

🤖 Solution Draft Log

This log file contains the complete execution trace of the AI solution draft process.

💰 Cost estimation:

• Model: GPT-5.6 Sol
• Provider: OpenAI
• Public pricing estimate: $28.160223

📊 Context and tokens usage:

• 522.4K / 200K (261%) input tokens, 53.5K / 128K (42%) output tokens

Total: (522.4K + 20.5M cached) input tokens, 53.5K output tokens, $28.160223 cost

🤖 Models used:

• Tool: OpenAI Codex
• Requested: gpt-5.6-sol
• Thinking level: medium (~15999 tokens)
• Model: GPT 5.6 Sol (gpt-5.6-sol)

📎 Log file uploaded as Gist (6461KB)

• View complete solution draft log

---

Now working session is ended, feel free to review and add any feedback on the solution draft.

[konard]

🎉 Auto-merged

This pull request has been automatically merged by hive-mind.

• All CI checks have passed

---

Auto-merged by hive-mind with --auto-merge flag