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* feat(prompt): thread-first comment reads for agent runs (MUL-2387) PR #2787 added --thread / --recent / --before / --before-id to the ListComments API and CLI but kept the agent prompt steering at the legacy "dump everything" recipe. On a long-running issue the flat dump burns context on chatter unrelated to the trigger; agents acting on the trigger want the trigger's thread first. Prompt updates: - Comment-triggered Workflow (runtime_config.go) now anchors step 2 on `multica issue comment list <issue-id> --thread <trigger-comment-id> --output json`. Fallback offers `--recent 20 --output json` with the stderr `Next thread cursor: --before <ts> --before-id <root-id>` line feeding the next-page cursor. `--since` is preserved and explicitly marked combinable with --thread / --recent. - Per-turn buildCommentPrompt (prompt.go) carries the same thread-first guidance so a Codex-style runtime that re-reads the per-turn message every iteration gets the same steering, even if it ignores the injected runtime config. - Assignment-triggered Workflow keeps the mandatory full-history rule (MUL-1124) but now also points at `--recent 20` as the long-issue alternative — this is the place that previously had no thread-aware guidance at all. - Default fallback prompt (no trigger comment, no chat, no autopilot, no quick-create) gains the same --recent hint without --thread (no comment to anchor on). - Available Commands core line surfaces the new flags so the discovery path matches the workflow guidance. Default CLI/API semantics are unchanged: the unparameterized list still returns the full chronological dump capped at 2000, --since still works on its own, and the desktop UI is untouched. Tests: - prompt_test.go: TestBuildPromptCommentTriggerPromotesThreadReads pins --thread <triggerID>, --recent 20, the stderr cursor phrasing, and the absence of the legacy "returns all comments" prose. - prompt_test.go: TestBuildPromptDefaultMentionsRecent guards the no-trigger fallback (mentions --recent, must NOT mention --thread). - execenv_test.go: TestInjectRuntimeConfigCommentTriggerThreadFirstReads asserts the comment-triggered Workflow steers at --thread/--recent, the Available Commands line surfaces the new flags, and the legacy "read the conversation (returns all comments...)" string is gone. - execenv_test.go: TestInjectRuntimeConfigAssignmentTriggerMentionsRecent keeps the mandatory full-history rule pinned AND asserts --recent is offered as the long-issue alternative. Also fixes the recent+since cursor nit Elon flagged in #2787's second review: when `since` empties the page, the `len(seenRoot) >= recentN` check used to emit a cursor anyway. Pagination walks threads in strictly decreasing last_activity_at — if every comment in this page is <= since, every older thread's last_activity is also <= since by transitivity, so the cursor would only invite the caller into a guaranteed-empty walk. Now suppressed; new tests pin both branches (suppressed when empty, retained when at least one row passes since). MUL-2387 Co-authored-by: multica-agent <github@multica.ai> * fix(comments): suppress recent+since cursor when head thread past since (MUL-2387) Previous suppression only tripped when the `since` filter emptied the page. That missed the mixed case Elon flagged in #2787's second review: the page keeps rows from fresher threads but the head (oldest-active) thread already sits at or before `since`, so every older page is guaranteed empty too. Predicating on `headLast <= since` covers both cases. Add a recent=2 + since fixture that pins the mixed scenario: root1 (last_activity = base+3m) is filtered out, root2 stays, and the cursor is suppressed even though the body is non-empty. Co-authored-by: multica-agent <github@multica.ai> * fix(prompt): clarify --recent is paging, not a replacement (MUL-2387) Address Elon's second-pass nit on #2816: the assignment-trigger workflow in runtime_config.go used "you may switch to --recent 20", which reads as a replacement for the mandatory full-history rule. Rephrase --recent as a paging strategy ("read the full history page-by-page, not a shortcut that replaces it") so it cannot conflict with the rule it lives next to. The default per-turn prompt in prompt.go opened with "If you need comment history" — that soft conditional contradicts the runtime workflow's mandatory read. Move it to a neutral "For comment history, follow the rule in your runtime workflow file" framing that defers to whatever the workflow says (mandatory for assignment, optional elsewhere) instead of encoding its own policy. Keep the runtime/prompt dual-layer fallback intact — different runtimes propagate the config file vs. the per-turn user prompt with varying fidelity, so both surfaces need the guidance. Tests pin the new phrasing against regression: - TestBuildPromptDefaultMentionsRecent now also forbids "If you need comment history" from sneaking back in. - TestInjectRuntimeConfigAssignmentTriggerMentionsRecent now also forbids "you may switch to" / "switch to `--recent" replacement phrasing. Co-authored-by: multica-agent <github@multica.ai> --------- Co-authored-by: multica-agent <github@multica.ai>