fix(rust): remove unused import warnings across core domains

[amiitt001]

Summary

• Removes all 12 unused_imports compiler warnings produced by cargo check --lib across 12 files in the Rust core.
• Fixes are grouped into three categories: removing genuinely dead imports, gating a platform-specific import under #[cfg(windows)], and suppressing intentional test-surface re-exports with #[allow(unused_imports)].
• No logic changed — imports were either unused, test-only, or platform-specific.

Problem

cargo check --lib produced 12 unused_imports warnings across core domains (channels, composio, learning, memory, skills, tools). These accumulated during the QuickJS runtime removal and subsequent refactors and create noise that obscures genuine new warnings during development.

Solution

Three fix strategies applied:

1. Remove dead imports — symbols imported but never referenced in production code (and not needed by test submodules): parse_attachment_markers, parse_path_only_attachment, FacetState (×2), UserState, LlmBackend (×2), LocalAiConfig, TreeKind, TreeStatus, SkillFrontmatter, std::sync::Arc (in stability_detector.rs — test-only).
2. Platform-gate — Mutex in composio/trigger_history.rs moved inside #[cfg(windows)] to match its sole usage site.
3. Suppress intentional re-exports — #[allow(unused_imports)] on pub use TelegramChannel (exists for channel_tests.rs path module) and pub(super) use backend_name (exists for browser_tests.rs). Removing these would break the test module import paths.

Submission Checklist

If a section does not apply to this change, mark the item as N/A with a one-line reason. Do not delete items.

• Tests added or updated (happy path + at least one failure / edge case) — N/A: pure import cleanup, no logic changed; existing tests are unaffected and continue to cover the same code paths.
• Diff coverage ≥ 80% — N/A: no new lines of executable code introduced; only import statements removed/gated. Coverage gate does not apply to import-only diffs.
• Coverage matrix updated — N/A: no feature rows added, removed, or renamed; this is a build-hygiene cleanup with no behavior change.
• All affected feature IDs from the matrix are listed in the PR description under ## Related — N/A: no feature matrix entries affected.
• No new external network dependencies introduced — N/A: no dependencies changed.
• Manual smoke checklist updated if this touches release-cut surfaces — N/A: no release-cut surfaces touched; import-only change.
• Linked issue closed via Closes #NNN in the ## Related section — N/A: no Linear issue; this is a maintainer-initiated cleanup PR.

Impact

• Build hygiene only. Zero runtime behavior change.
• cargo check --lib warning count reduced from 12 (targeted) to 0 for the unused_imports category.
• The 4 remaining pre-existing warnings (PermissionsExt, unused_mut, unused_variables, private_interfaces) are unchanged and in different files/modules; they are not in scope for this PR.

Related

• Follow-up PR(s)/TODOs: The 4 remaining pre-existing Tauri shell warnings (unused_imports, dead_code) in app/src-tauri/ can be addressed in a follow-up.

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AI Authored PR Metadata (required for Codex/Linear PRs)

Keep this section for AI-authored PRs. For human-only PRs, mark each field N/A.

Linear Issue

• Key: N/A — maintainer-initiated cleanup, no Linear issue.
• URL: N/A

Commit & Branch

• Branch: fix/rust-unused-import-warnings
• Commit SHA: 28299f0e669587360bae4d2e70cba73ed4873e42

Validation Run

• pnpm --filter openhuman-app format:check — passed (run by Husky pre-push hook)
• pnpm typecheck — passed (run by Husky pre-push hook, 0 errors)
• Focused tests: N/A — no logic changed; test modules using the re-exported symbols (channel_tests.rs, browser_tests.rs) are covered by existing CI test runs.
• Rust fmt/check (if changed): cargo check --lib → 0 targeted warnings; cargo fmt --check passed (enforced by pre-push hook and Type Check / Rust Quality CI job ✅).
• Tauri fmt/check (if changed): N/A — no app/src-tauri/ files modified.

Validation Blocked

• command: N/A — all local validation completed successfully.
• error: N/A
• impact: N/A

Behavior Changes

• Intended behavior change: None. Import-only cleanup.
• User-visible effect: None.

Parity Contract

• Legacy behavior preserved: All removed imports were unused; no call sites removed.
• Guard/fallback/dispatch parity checks: N/A — no guard/dispatch logic changed.

Duplicate / Superseded PR Handling

• Duplicate PR(s): None.
• Canonical PR: This PR.
• Resolution: N/A.

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR performs systematic import cleanup across twelve modules in the openhuman codebase. Changes include adding compiler pragmas to suppress unused-import warnings, removing unused configuration and domain-model type imports, and aligning standard library imports with actual usage. No functional logic or public API signatures are altered.

Changes

Import Cleanup and Dead Code Elimination

Layer / File(s)	Summary
Compiler pragmas for conditional imports src/openhuman/channels/providers/telegram/channel.rs, src/openhuman/tools/impl/browser/browser.rs	Add #[allow(unused_imports)] attributes to suppress warnings in modules where conditional compilation or platform-specific imports may appear unused.
Configuration imports cleanup src/openhuman/memory/tree/chat/mod.rs, src/openhuman/memory/tree/score/extract/mod.rs, src/openhuman/memory/store/factories.rs	Remove unused LlmBackend from config imports and LocalAiConfig from factories; add DEFAULT_CLOUD_LLM_MODEL to chat module for cloud model selection.
Domain model imports cleanup src/openhuman/composio/providers/profile.rs, src/openhuman/learning/cache.rs, src/openhuman/skills/ops_create.rs	Remove unused domain types (FacetState, SkillFrontmatter) from module imports; adjust profile re-exports to include only FacetType.
Standard library and feature imports alignment src/openhuman/composio/trigger_history.rs, src/openhuman/learning/stability_detector.rs, src/openhuman/channels/providers/telegram/channel_send.rs, src/openhuman/memory/tree/tree_source/source_file.rs	Make Mutex a Windows-only import in trigger_history; replace Arc with HashMap in stability_detector; simplify attachment and tree type imports to match actual usage.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Suggested labels

working

Suggested reviewers

• senamakel

Poem

🐰 Imports trimmed and pragmas placed,
Dead code swept without a trace,
Modules lean and clean once more,
Warnings silenced at the door. ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title 'fix(rust): remove unused import warnings across core domains' clearly and specifically summarizes the main change—cleaning up unused imports and compiler warnings throughout the codebase.
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.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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[Copilot]

Pull request overview

Cleanup of Rust compiler warnings about unused imports across multiple core domains. The PR either drops the unused bindings, narrows the import set, or applies #[allow(unused_imports)] on items that exist solely as test-surface re-exports. One import is gated with #[cfg(windows)] to match its sole usage site.

Changes:

• Remove unused symbols from use statements in 9 files (channels, composio, learning, memory, skills).
• Add #[cfg(windows)] gating for std::sync::Mutex in composio/trigger_history.rs.
• Suppress unused_imports on intentional #[path]-based test re-exports in telegram/channel.rs and browser/browser.rs.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/openhuman/tools/impl/browser/browser.rs	Adds #[allow(unused_imports)] on test-surface re-export.
src/openhuman/skills/ops_create.rs	Drops unused SkillFrontmatter from import list.
src/openhuman/memory/tree/tree_source/source_file.rs	Narrows import to just Tree; however TreeKind/TreeStatus are still referenced by the in-file test module.
src/openhuman/memory/tree/score/extract/mod.rs	Drops unused LlmBackend.
src/openhuman/memory/tree/chat/mod.rs	Drops unused LlmBackend (still referenced only in a comment).
src/openhuman/memory/store/factories.rs	Drops unused LocalAiConfig (only referenced in doc comments).
src/openhuman/learning/stability_detector.rs	Drops top-level Arc import; tests re-import it locally.
src/openhuman/learning/cache.rs	Drops FacetState bare binding (still re-exported by full path below).
src/openhuman/composio/trigger_history.rs	Gates Mutex import with #[cfg(windows)].
src/openhuman/composio/providers/profile.rs	Drops unused FacetState/UserState.
src/openhuman/channels/providers/telegram/channel.rs	Adds #[allow(unused_imports)] on intentional re-export.
src/openhuman/channels/providers/telegram/channel_send.rs	Drops unused parse_attachment_markers and parse_path_only_attachment.

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@src/openhuman/memory/tree/tree_source/source_file.rs`:
- Line 35: The test module fails because TreeKind and TreeStatus aren't exported
into the parent module scope; add imports for these test enums/types alongside
the existing Tree import so the test's use super::*; can access them —
specifically import TreeKind and TreeStatus (the symbols used in the tests) into
the module that contains the test (where Tree is imported) so lines referencing
TreeKind and TreeStatus compile.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 7eee3d61-e043-477c-b052-e97a5abb756c

📥 Commits

Reviewing files that changed from the base of the PR and between f9de38d and 28299f0.

📒 Files selected for processing (12)

• src/openhuman/channels/providers/telegram/channel.rs
• src/openhuman/channels/providers/telegram/channel_send.rs
• src/openhuman/composio/providers/profile.rs
• src/openhuman/composio/trigger_history.rs
• src/openhuman/learning/cache.rs
• src/openhuman/learning/stability_detector.rs
• src/openhuman/memory/store/factories.rs
• src/openhuman/memory/tree/chat/mod.rs
• src/openhuman/memory/tree/score/extract/mod.rs
• src/openhuman/memory/tree/tree_source/source_file.rs
• src/openhuman/skills/ops_create.rs
• src/openhuman/tools/impl/browser/browser.rs

💤 Files with no reviewable changes (1)

• src/openhuman/learning/stability_detector.rs