feat(hud): cost velocity indicator (Wave 2-B)#1483
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Shows session spend rate next to absolute cost so users can see whether they're on a slow planning pass or a hot refactor burn: $1.23↗$0.08/m Trend glyphs: - 🔥 rate >= $0.20/min (hot burn) - ↗ $0.01 <= rate < $0.20/min (normal/rising) - → 0 < rate < $0.01/min (steady, very low) - 💤 rate <= 0 (idle) Stateless implementation: rate = cost_usd / (duration_ms / 60k). Uses Claude Code stdin.cost.total_cost_usd and total_duration_ms directly, with hud_state.sessionStartTimestamp fallback for the elapsed-time component. Deliberately does NOT touch hud_state.py schema (costHistory was deferred per Wave 0 review). New lib/hud_velocity.py: - TREND_IDLE_MAX=0.01, TREND_HOT_MIN=0.20 constants - compute_spend_rate(cost_usd, duration_ms) -> float - trend_glyph(rate) -> str - format_velocity_segment(stdin_data, hud_state) -> str - format_cost_with_velocity(cost_usd, stdin, hud_state, *, is_exact) - _duration_ms_from_state helper for stdin fallback 33 new tests cover: - compute_spend_rate: zero/negative/non-numeric/numeric-string, known rates ($1/min, $0.50/30s, $6/10min) - trend_glyph: all 4 tiers + boundary values + non-numeric - format_velocity_segment: empty, missing cost, missing duration, zero rate, normal hot, rising tier, state fallback, no state - format_cost_with_velocity: exact/estimate prefix, no-velocity fallback, non-numeric cost, two decimals - Constant ordering 162/162 pass. Part of #1464 (Wave 0 statusbar refactor)
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Combined Wave 0 polish items from the #1465/#1485 review cycle: 1. Narrow `except Exception` to `except ImportError` in the 3 lib fallback import blocks (qual-1465 HIGH-1). Real logic bugs (SyntaxError, NameError, AttributeError) inside lib modules now surface immediately instead of being silently swallowed by a catch-all. 2. Drop inline stub functions for format_rate_limits and _get_fresh_version (qual-1465 HIGH-2). Eliminates the signature drift between canonical lib definitions and in-file fallback stubs observed on the integrator branch (Wave 1-A plugin_json_file kwarg drift). The outer main() try/except still catches any runtime failure and emits the minimal safe output via the BUDDY_FACE constant. 3. Hoist hud_velocity and hud_cache_savings imports to module top as _format_velocity_segment and _format_cache_savings (perf-1485 H1). Eliminates ~0.47us sys.modules lookup per render. Integrator branch only - no-op on refactor/wave branches where the inline imports don't exist yet. 4. Bump next to 16.2.3 for GHSA-q4gf-8mx6-v5v3 (landing-security-check). Aligns eslint-config-next and updates setup.test.ts assertion. Refs: qual-1465 HIGH-1/2, perf-1485 H1, GHSA-q4gf-8mx6-v5v3
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Superseded by #1485This PR was part of a stacked PR structure ( All of this PR's commits have been consolidated into #1485 (now with
EVAL review results from this PR (all reviewers, iter1 converged → Critical=0, High=0) already applied in #1485. Closing as superseded. Use #1485 with GitHub's Rebase and merge button to land all 12 commits linearly on master. |
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Closes the velocity issue. Stacked on #1465. 33 new tests. 162/162 pass. Stateless — no hud_state schema changes.