Crate context_bar 

ContextBar — Zed extension entry point + engine re-exports.

The reusable engine now lives in the context-bar-core crate. This crate is the thin host layer: it re-exports the engine modules under their historical paths (so context_bar::usage_signal, crate::context_engine, … keep resolving for the CLI binary, the example, and the wasm glue below) and adds the Zed extension surface.

Verified

• Extension loads in Zed Preview.
• process:exec can shell out to git inside the worktree.
• Engine writes .context-bar/{state.json,brief-*.md,AGENT.md} artifacts.
• run_slash_command receives a Worktree and is the strongest verified hook to wire automatic refresh into.

Unverified / explicitly isolated behind seams

• Zed has no public always-on HUD primitive yet. The HUD layer is expected to consume state.json directly when a hook exists.
• zed_extension_api 0.7 exposes no load-time or worktree-open hook, so the first refresh fires on the first agent interaction that reaches the extension (any slash command). After that, [auto_refresh::refresh] keeps the surface fresh idempotently. Once a real load hook ships, the call site moves; the function does not.
• Codex ACP threads in Zed Preview do not currently invoke extension slash commands. Agents are therefore expected to read .context-bar/AGENT.md from the filesystem (Codex/Claude conventions) until a richer automatic-context hook is verified.
• The seam for both cases is context_engine::assemble, which takes pre-collected signals and is decoupled from zed::Worktree.

Modules

agent_context

Combined, agent-readable brief.

claude_statusline

context_engine

detail_html

Detail page renderer.

git_signal

hud

HUD rendering.

i18n

Bilingual (EN/TR) text selection, shared by every Rust surface.

live

5h-block burn status — the engine half of the live dashboard (ROADMAP B2) and the native popover gauge (C1). Pure: derives burn rate, % of limit, ETA-to-limit, and a projected block total from a snapshot + a clock.

report

Tabular usage/cost reports built from a UsageSnapshot.

state_writer

time_windows

usage_signal

Cross-project agent usage signals.