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claude: Bash live-tail detection + read-only file follower (T-325, core)

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The detection/follow core for the live-tail sub-card, with the UI wiring
to follow. Claude Code runs every Bash tool itself and clide only sees the
final tool_result block — we can't mirror the running process, so instead
we detect a file-backed source the command follows and open our own
read-only follower on the same file.

- bash_tail_source.dart: detectBashTailSource() parses a Bash command for a
  single, safe, file-backed source (tail/cat/less with one file arg, inside
  the workspace via resolveUnderRoot). Returns null for a pipe-into-tail, a
  redirect, two files, or a path outside the repo — the caller then shows a
  "nothing to follow" note. bashHasTailIntent() gates WHEN the segment
  appears: v1 triggers on `tail`/follow-flags only, so ordinary cat/ls/git
  cards stay clean (cat/less remain detectable for later).
- file_tail_follower.dart: a polling, read-only `tail -f`-style follower
  (no subprocess, no touching Claude's command) that emits the trailing
  window then appended deltas, and re-reads from the top on truncation.

Tested: 19 parser cases (incl. the `git push | tail -25` and outside-
workspace null cases), the intent predicate, and the follower (initial
window / appended delta / missing file / rotation / start / stop).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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jpmschweitzer
2026-06-11 17:12:53 +02:00
co-authored by Claude Opus 4.8
parent d43ddfed9c
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@@ -133,6 +133,10 @@ You might also want, project-permitting:
- [D-89: inline pasted-image thumbnails that expand to the lightbox](decisions/design.md#d-89-inline-pasted-image-thumbnails-that-expand-to-the-lightbox) — _design_
- [D-90: clide:// deep links — paranoid allowlist + user confirmation](decisions/architecture.md#d-90-clide-deep-links--paranoid-allowlist--user-confirmation) — _architecture_
- [D-91: Unified conversation drawing card backed by a canvas renderer](decisions/architecture.md#d-91-unified-conversation-drawing-card-backed-by-a-canvas-renderer) — _architecture_
- [D-92: Ship pql bundled with clide](decisions/tooling.md#d-92-ship-pql-bundled-with-clide) — _tooling_
- [D-93: clide writes no directories of its own into the workspace](decisions/architecture.md#d-93-clide-writes-no-directories-of-its-own-into-the-workspace) — _architecture_
- [D-94: Workspace mode is a first-class, extensible declared capability](decisions/architecture.md#d-94-workspace-mode-is-a-first-class-extensible-declared-capability) — _architecture_
- [D-95: Workspace validity and onboarding flow](decisions/architecture.md#d-95-workspace-validity-and-onboarding-flow) — _architecture_
## Open questions