Bound construct MCP context usage#865
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Summary\n\n- bound high-volume construct MCP reads with compact defaults, pagination, truncation metadata, and explicit full-detail opt-ins\n- add etag-based construct_context reuse and compact fleet, transcript, PTY, diff, usage, subagent, and Program projections\n- replace construct_program_update shimmer arrays with a compact pending map keyed by zero-based block index\n- document the agent-facing MCP context-budget contract\n\n## Breaking changes\n\n- several read tools now return compact projections by default; callers needing legacy-rich data must request detail: full where offered\n- construct_program_update accepts markdown plus pending instead of parallel shimmer and tooltip arrays\n- construct_program_get and Program catalog tools omit large bodies and revision history unless explicitly requested\n\n## Verification\n\n- cargo test -p construct-mcp --lib\n- cargo test -p construct-client -p construct-protocol\n- cargo check -p construct-mcp\n- cargo build\n- git diff --check\n\nNo recording: this changes the MCP protocol/context surface and has no user-visible TUI rendering change.