feat: token savings tracking and metrics (M26)#445
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Add command-aware output filter pipeline in ShellExecutor that compresses tool output before context insertion. Filters: test (failures-only), git (compact stats), clippy (group by rule), dir listing (noise removal), log dedup (normalize+count). ANSI stripping runs unconditionally. Closes #427, closes #428, closes #429, closes #430, closes #431, closes #432, closes #433
Add FilterStats to ToolOutput for per-execution filter metrics. Record cumulative filter_raw_tokens, filter_saved_tokens, and filter_applications in MetricsSnapshot. Log session-end summary on agent shutdown. Display savings in TUI Resources panel. Closes #434
Add mock feature to full feature set so integration tests compile. Add filter_stats: None to all test ToolOutput constructors. Gate unused OllamaProvider import behind a2a feature.
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Summary
FilterStatsstruct toToolOutputcarrying raw/filtered char counts withsavings_pct()andestimated_tokens_saved()methodsMetricsSnapshotwithfilter_raw_tokens,filter_saved_tokens,filter_applicationscountersTest plan
FilterStats::savings_pctcorrectnessFilterStats::savings_pctzero-division safetyFilterStats::estimated_tokens_savedcalculationMetricsCollectorfilter metrics accumulationCloses #434