docs(#5138): context composition breakdown — PRD §5.6 + roadmap Phase-3#246
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docs(#5138): context composition breakdown — PRD §5.6 + roadmap Phase-3#246Skobeltsyn wants to merge 1 commit into
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…-3 point Adds the planned 'Context Usage' feature (Cursor-style per-category token accounting of the model window) to the PRD (§5.6, after Budget/Observability — the natural companion to budget) and the development plan (roadmap Phase-3, alongside the observability foundation). Typed ContextBreakdown + agent.contextBreakdown(input) dry-run + PipelineEvent.ContextComposed; category taxonomy mapped to each framework construct; feeds prompt-caching (#2655) + compaction. Tracking: #5138 (planned). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Captures the Context Usage feature (Cursor-style per-category token accounting of the model window) in the PRD and the development plan, per request.
What lands
ContextBreakdownsurface (agent.contextBreakdown(input)dry-run +PipelineEvent.ContextComposedlive), and the rationale (cost/latency, caching, compaction, audit).[ ]dev-plan point alongside the observability foundation, cross-linking PRD §5.6, prompt-caching (#2655), and compaction.Framing
Positioned as the runtime companion to the permission manifest: the manifest says what can enter context (capability graph), the breakdown says what did, per turn, joinable to the manifest hash — on the boundaries-you-can-measure line. Docs-only;
DocsConsistencyTest+InternalsAgentTestgreen.🤖 Generated with Claude Code