[jbeda]

Stage

Implementation

Summary

• migrates the read-only /agents definition inventory to a pointer-owned bounded viewport with responsive measured geometry and a 128-column centered-card cap
• adds compact close-only fallback, per-open result ownership, physical paging, and visible-owner wheel scrolling
• preserves the legacy root-owned overlay, read-only discovery behavior, and terminal sanitization

Plan / interface baseline

• Plan / Interface PR: docs(plan): bound agent inventory viewport #1946
• Approved baseline: 117074209
• Interfaces match approved contract: Yes
• No implementation deviation required an amendment beyond the explicitly authorized direct implementation-PR amendment recorded in 09f3be0f3: remappable physical paging and per-event root-owned wheel scrolling, with burst coalescing deferred to mecatui: coalesce smooth wheel input and avoid Agents scroll backlog #1790.

Acceptance and verification

Completed AC1.1–AC3.5 in docs/acceptance/mecatui-agent-inventory-bounded-viewport.md.

task docs
task lint
task test
task test:race
task ac-trace-strict
go run ./cmd/mecademo

Panel review: PANEL: ship_blockers=0 important=0 advisory=0 reviewer_failures=0

Closes #1897