feat(plugin): redesign CodingBuddy status bar as a two-line workflow snapshot

[JeremyDev87]

Background

CodingBuddy already installs a custom Claude Code statusLine script via /Users/pjw/workspace/codingbuddy/packages/claude-code-plugin/hooks/session-start.py.

However, the current status line still has several product gaps:

• it relies on estimated cost/duration instead of exact Claude Code telemetry where available
• it underuses Claude Code stdin fields such as exact cost, duration, rate limits, worktree, and agent info
• it exposes only a thin workflow snapshot from CodingBuddy state
• its second line is not yet a compact, intuitive, badge-based summary of what the workflow is doing
• the status bar and the live spinner/statusMessage surface are not clearly separated in product intent

The desired behavior is:

• Status bar: a stable two-line workflow snapshot for Claude Code terminal usage
• Spinner / statusMessage: the more transient live activity surface

Claude Code supports multi-line status lines, so CodingBuddy can intentionally use two lines rather than trying to compress everything into one.

Goal

Redesign the CodingBuddy status bar into a reliable two-line snapshot with:

• exact Claude Code telemetry on the first line
• a compact badge-based workflow strip on the second line
• clearer state ownership between stdin telemetry, HUD state, and live hook activity

Scope

In scope:

• codingbuddy-hud.py data sourcing and rendering
• HUD state schema and updates
• hook wiring needed to keep the workflow snapshot useful
• badge design for the second line
• documentation of the status bar model and multiline support

Out of scope:

• TUI HUD redesign
• replacing PreToolUse spinner/statusMessage behavior
• unrelated command namespace work

Proposed UX

Line 1 should read like a stable session summary, for example:

◕‿◕ CB | PLAN | technical-planner | Opus | 18% ctx | $0.015 | 4m

Line 2 should read like compact workflow badges, for example:

[◮ secu] [🔍 auth] [⚠1]

The intended interpretation is:

• line 1 = core telemetry and session state
• line 2 = CodingBuddy workflow meaning

Acceptance criteria

This parent issue is complete when all of the following are true:

• the first line prefers exact Claude Code stdin telemetry over internal estimates when available
• the second line renders as compact badge-based workflow state rather than a plain sentence dump
• HUD state can store enough workflow information to power the second line
• the relevant hooks keep HUD state fresh enough to make the snapshot useful
• docs explain the two-line model and the difference between stable status bar state vs live spinner/statusMessage activity

Sub-issues

• feat(plugin): use exact Claude Code stdin telemetry in codingbuddy-hud.py #1325 Use exact Claude Code stdin telemetry in codingbuddy-hud.py
• feat(plugin): extend HUD state schema for richer workflow snapshots #1326 Extend HUD state schema for richer workflow snapshots
• feat(plugin): wire hook-driven workflow state updates into the HUD snapshot #1324 Wire hook-driven workflow state updates into the HUD snapshot
• feat(plugin): add a badge-based second line renderer for the CodingBuddy status bar #1323 Add a badge-based second line renderer for the CodingBuddy status bar
• docs(plugin): document the two-line status bar model and its data-source priorities #1322 Document the two-line status bar model and its data-source priorities

Recommended order

1. feat(plugin): use exact Claude Code stdin telemetry in codingbuddy-hud.py #1325
2. feat(plugin): extend HUD state schema for richer workflow snapshots #1326
3. feat(plugin): wire hook-driven workflow state updates into the HUD snapshot #1324
4. feat(plugin): add a badge-based second line renderer for the CodingBuddy status bar #1323
5. docs(plugin): document the two-line status bar model and its data-source priorities #1322

[JeremyDev87]

All 5 sub-issues completed and merged:

• feat(plugin): extend HUD state schema for richer workflow snapshots #1326 HUD state schema extension (PR feat(plugin): extend HUD state schema for richer workflow snapshots (#1326) #1328) ✅
• feat(plugin): use exact Claude Code stdin telemetry in codingbuddy-hud.py #1325 Exact stdin telemetry (PR feat(plugin): use exact Claude Code stdin telemetry in status bar (#1325) #1330) ✅
• docs(plugin): document the two-line status bar model and its data-source priorities #1322 Status bar model docs (PR docs(plugin): document two-line status bar model and data-source priorities (#1322) #1329) ✅
• feat(plugin): add a badge-based second line renderer for the CodingBuddy status bar #1323 Badge-based second line renderer (PR feat(plugin): add badge-based second line renderer for status bar (#1323) #1332) ✅
• feat(plugin): wire hook-driven workflow state updates into the HUD snapshot #1324 Hook-driven workflow state updates (PR feat(plugin): wire hook-driven workflow state updates into HUD snapshot (#1324) #1331) ✅

Two-line status bar redesign complete.