11 Commits

Author SHA1 Message Date
Naiyuan Qing
4ae4722ef0 fix(comments): preserve direct parent on replies (#3579)
Co-authored-by: multica-agent <github@multica.ai>
2026-06-01 08:28:15 +08:00
Naiyuan Qing
973a43923f fix(comments): revert since-delta to issue-wide, steer to parent thread first (#3535)
#3509/#3523 scoped the comment-trigger since-delta count to the triggering
thread, so an agent resuming a busy issue only saw "+N in this thread" and
lost visibility of new comments in other threads. Revert the count to
issue-wide (every thread), keeping the trigger-comment + agent-own
exclusions, and reshape the warm-path hint to:

  - report the issue-wide new-comment volume,
  - steer the agent to read the triggering (parent) thread FIRST
    (`--thread <trigger> --since`, or `--tail 30` for full context),
  - demote the issue-wide `--since` catch-up to an only-if-needed fallback
    ("don't read them all blindly").

Also fixes the now-stale "scoped to the triggering thread" wording in the
resumed-session no-delta hint (it's issue-wide zero now).

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
Co-authored-by: multica-agent <github@multica.ai>
2026-05-29 20:13:23 +08:00
Multica Eve
9616d78e47 MUL-2785: optimize resumed comment reads (#3509)
* feat(comments): skip default thread read on resumed comment sessions

Co-authored-by: multica-agent <github@multica.ai>

* fix(comments): scope since delta to trigger thread

Co-authored-by: multica-agent <github@multica.ai>

* chore(comments): address thread delta review nits

Co-authored-by: multica-agent <github@multica.ai>

---------

Co-authored-by: Eve <eve@multica-ai.local>
Co-authored-by: multica-agent <github@multica.ai>
2026-05-29 14:57:14 +08:00
Bohan Jiang
75b5be3f8e feat(comments): roots-only thread stats + summary projection for comment list (MUL-2809) (#3505)
* feat(comments): roots-only thread stats + summary projection for comment list

Enrich the roots_only read so each root carries reply_count (recursive
descendant count) and last_activity_at (MAX created_at over the subtree),
letting an agent triage which thread to open without fetching any replies.

Add an orthogonal summary=true projection (--summary) that clips each
returned comment's content to a fixed budget and sets content_truncated,
so an agent can scan a list cheaply before pulling a full body. It composes
with every read mode (default, since, thread, recent, roots_only).

New response fields are optional (omitempty) and only populated for the
agent-facing query params, so the default response shape is unchanged for
the desktop/web and existing CLI callers.

Co-authored-by: multica-agent <github@multica.ai>

* test(comments): cover roots_only + summary composition end-to-end

The summary projection composing with roots_only is the spec's headline
"table of contents" read, but it was only exercised at the CLI param-
forwarding level — no handler test asserted that a roots_only response
both clips content AND keeps reply_count / last_activity_at. A refactor
moving the clip into a per-mode branch would silently break that
composition with no failing test.

Add TestListComments_RootsOnlySummaryComposes: a long root + a reply,
read via roots_only=true&summary=true, asserting the root is clipped
(content_truncated=true) while its subtree stats still surface.

Co-authored-by: multica-agent <github@multica.ai>

* refactor(comments): address review nits on roots stats + summary

- ListRootComments[Since]ForIssue: scope the recursive membership walk to a
  selected_roots CTE (the @row_limit page, with the @since cut applied up front)
  so stats are only computed over the subtrees of the roots actually returned,
  instead of every thread in the issue.
- summarizeContent: scan by rune and stop at the budget+1th rune instead of
  allocating a full []rune for the whole body, so a pathologically long comment
  costs only the budget under summary mode. Add a multi-byte (CJK) test to lock
  rune-boundary clipping.

Co-authored-by: multica-agent <github@multica.ai>

---------

Co-authored-by: J <j@multica.ai>
Co-authored-by: multica-agent <github@multica.ai>
2026-05-29 12:59:53 +08:00
Fangfei
c730e906b9 feat(cli): add roots-only issue comment listing (MUL-2805) (#3288) 2026-05-29 12:03:38 +08:00
Naiyuan Qing
3187bbf90c feat(comments): re-add since-delta + cold-start thread read + parent-root write normalization (#3494)
* feat(comments): since-delta new-comment hint + default-on comment session resume (#3432)

* feat(db): add unresolved comment count + list filter queries

Add CountUnresolvedComments (excludes the agent's own comments) and
ListUnresolvedCommentsForIssue. Both are additive — existing callers stay
on the unfiltered queries — so old clients are unaffected.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* feat(handler): support unresolved-only comment listing

Wire an additive `unresolved` query param into ListComments. Defaults off
so an old CLI that never sends it gets unchanged behavior; only true/1
enable it. Rejects combining unresolved with thread/recent (whole-issue
filter vs navigation models). Includes filter + count query tests.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* feat(handler): plumb unresolved count + thread root into claim, gate comment resume

Populate trigger_parent_id (thread root of the trigger comment) and
unresolved_count (excludes the agent's own comments) on comment-triggered
claim responses. Both fields are omitempty so old daemons ignore them.

Gate comment-triggered session resume behind MULTICA_RESUME_COMMENT_SESSION
(default off): resumed comment turns can inherit the prior turn's "Done."
final message, so this stays an explicit rollout switch. The runtime-match
and poisoned-session guards still apply regardless of the flag.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* feat(daemon): inject unresolved-comments hint + resolve step into agent brief

Add a shared BuildUnresolvedCommentsHint helper rendered on both the
per-turn prompt and the CLAUDE.md workflow (kept in sync per PR #2816). It
ships only the count and the relevant CLI call — never comment bodies — so
the server stays cheap. Thread case points at --thread <root>; issue case
points at --unresolved. Suppressed when the count is 0.

Also add a workflow step telling the agent to `multica comment resolve
<thread-root>` once a thread is fully handled, so the unresolved set
converges.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* feat(cli): add comment list --unresolved and comment resolve command

Add an --unresolved filter to `issue comment list` (wired to the server's
unresolved param, rejected when combined with --thread/--recent) and a
top-level `comment resolve <id>` command that POSTs to the existing
/api/comments/{id}/resolve endpoint, letting an agent close threads it has
fully handled.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* refactor(comments): since-delta new-comment hint + default-on comment resume

Simplifies the comment-triggered agent flow down to what's actually needed:

- New-comment awareness is now a pure time delta: the claim response carries
  new_comment_count + new_comments_since (anchored on the prior run's
  started_at, never completed_at so a long run can't miss comments). The
  per-turn prompt and CLAUDE.md workflow render one line — "N new comment(s)
  since your last run, --since <ts>" — via a shared BuildNewCommentsHint so the
  two surfaces can't drift. Cold start (no prior run) falls back to a plain read.
- Comment-triggered tasks resume the prior session by default (same runtime),
  dropping the MULTICA_RESUME_COMMENT_SESSION rollout gate. The "Focus on THIS
  comment" prompt guard defends against inheriting the prior turn's "Done."
  marker; GetLastTaskSession still excludes poisoned sessions.
- Drops the resolved-based machinery from the first draft: CountUnresolvedComments
  / ListUnresolvedCommentsForIssue queries, the `comment list --unresolved`
  flag, the `multica comment resolve` command, and the resolve workflow step.
- Removes the verbose cursor-pagination paragraph from the comment prompt; the
  --thread/--recent/--since flags stay in the CLI/API, just no longer explained
  inline every turn.

Compatibility: new claim fields are omitempty (old daemons ignore them).
Comment resume is default-on and affects even old daemons, which already
consume prior_session_id.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* feat(comments): collapse reply parent_id to thread root on write

Comment threads are a 2-level model (root + flat replies, like Linear/Slack),
enforced today only by the UI and the agent path — the CreateComment handler
stored whatever parent_id it was handed, and the agent-side flatten walked just
one level, so a reply-to-a-reply could land at depth 3+. Add GetThreadRoot (a
recursive walk to the parent_id=NULL root) and run both write paths
(handler.CreateComment, service.createAgentComment) through it, so every stored
reply's parent_id IS its thread root. Readers can now treat parent_id as the
thread root without re-walking. The agent-drift guard still compares the raw
parent_id to the trigger comment before normalization.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* feat(comments): cold-start reads triggering thread, warm keeps --thread pointer

The since-delta rework dropped the thread-first read on the COLD path: a
first-time agent fell back to the flat `comment list` dump (oldest-first, cap
2000), burying the trigger's context in ancient chatter. Point cold start at the
triggering conversation instead via a shared BuildColdCommentsHint
(`--thread <trigger> --tail 30` + a --recent pointer for cross-thread
background). On the WARM path, --since is a pure time delta and can miss the
triggering thread's pre-anchor history, so BuildNewCommentsHint now also emits a
--thread pointer. Both surfaces (per-turn prompt + CLAUDE.md workflow) render via
the shared helpers so they cannot drift (PR #2816 rule).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-29 10:38:37 +08:00
Naiyuan Qing
d90732750f Revert "feat(comments): since-delta new-comment hint + default-on comment ses…" (#3455)
This reverts commit 5e78e5100a.
2026-05-28 17:52:59 +08:00
Naiyuan Qing
5e78e5100a feat(comments): since-delta new-comment hint + default-on comment session resume (#3432)
* feat(db): add unresolved comment count + list filter queries

Add CountUnresolvedComments (excludes the agent's own comments) and
ListUnresolvedCommentsForIssue. Both are additive — existing callers stay
on the unfiltered queries — so old clients are unaffected.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* feat(handler): support unresolved-only comment listing

Wire an additive `unresolved` query param into ListComments. Defaults off
so an old CLI that never sends it gets unchanged behavior; only true/1
enable it. Rejects combining unresolved with thread/recent (whole-issue
filter vs navigation models). Includes filter + count query tests.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* feat(handler): plumb unresolved count + thread root into claim, gate comment resume

Populate trigger_parent_id (thread root of the trigger comment) and
unresolved_count (excludes the agent's own comments) on comment-triggered
claim responses. Both fields are omitempty so old daemons ignore them.

Gate comment-triggered session resume behind MULTICA_RESUME_COMMENT_SESSION
(default off): resumed comment turns can inherit the prior turn's "Done."
final message, so this stays an explicit rollout switch. The runtime-match
and poisoned-session guards still apply regardless of the flag.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* feat(daemon): inject unresolved-comments hint + resolve step into agent brief

Add a shared BuildUnresolvedCommentsHint helper rendered on both the
per-turn prompt and the CLAUDE.md workflow (kept in sync per PR #2816). It
ships only the count and the relevant CLI call — never comment bodies — so
the server stays cheap. Thread case points at --thread <root>; issue case
points at --unresolved. Suppressed when the count is 0.

Also add a workflow step telling the agent to `multica comment resolve
<thread-root>` once a thread is fully handled, so the unresolved set
converges.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* feat(cli): add comment list --unresolved and comment resolve command

Add an --unresolved filter to `issue comment list` (wired to the server's
unresolved param, rejected when combined with --thread/--recent) and a
top-level `comment resolve <id>` command that POSTs to the existing
/api/comments/{id}/resolve endpoint, letting an agent close threads it has
fully handled.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* refactor(comments): since-delta new-comment hint + default-on comment resume

Simplifies the comment-triggered agent flow down to what's actually needed:

- New-comment awareness is now a pure time delta: the claim response carries
  new_comment_count + new_comments_since (anchored on the prior run's
  started_at, never completed_at so a long run can't miss comments). The
  per-turn prompt and CLAUDE.md workflow render one line — "N new comment(s)
  since your last run, --since <ts>" — via a shared BuildNewCommentsHint so the
  two surfaces can't drift. Cold start (no prior run) falls back to a plain read.
- Comment-triggered tasks resume the prior session by default (same runtime),
  dropping the MULTICA_RESUME_COMMENT_SESSION rollout gate. The "Focus on THIS
  comment" prompt guard defends against inheriting the prior turn's "Done."
  marker; GetLastTaskSession still excludes poisoned sessions.
- Drops the resolved-based machinery from the first draft: CountUnresolvedComments
  / ListUnresolvedCommentsForIssue queries, the `comment list --unresolved`
  flag, the `multica comment resolve` command, and the resolve workflow step.
- Removes the verbose cursor-pagination paragraph from the comment prompt; the
  --thread/--recent/--since flags stay in the CLI/API, just no longer explained
  inline every turn.

Compatibility: new claim fields are omitempty (old daemons ignore them).
Comment resume is default-on and affects even old daemons, which already
consume prior_session_id.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-28 15:58:42 +08:00
Bohan Jiang
7f9e4e829d feat(comments): thread-internal --tail pagination + reply cursor (MUL-2421) (#2846)
* feat(comments): thread-internal pagination via --tail + reply cursor (MUL-2421)

Long threads inside a single issue still forced agents to read every reply
once they used --thread, even after MUL-2387 fixed cross-thread noise. This
adds reply-level paging so a 200-reply thread can be navigated tail-first
without dragging the whole conversation into prompt context.

- New SQL query ListThreadCommentsForIssuePaged: same recursive root walk
  as the legacy thread query, but caps reply count and supports an
  (created_at, id) composite cursor. Root is unconditional — even tail=0
  emits it so the reader keeps the "what is this thread about" context.
- Handler ListComments: parses `tail` (non-negative, ThreadTailSet flag
  preserves the tail=0 intent), threads it through to the paged query,
  and re-uses X-Multica-Next-Before / X-Multica-Next-Before-Id for the
  reply cursor. Cursor's meaning is now context-dependent: thread cursor
  under --recent, reply cursor under --thread + --tail.
- CLI: new --tail flag (only valid with --thread; mutually exclusive
  with --recent), reply-cursor semantics for --before / --before-id when
  paired with --thread + --tail, stderr label flips to "Next reply cursor"
  so an operator copy-pasting the cursor knows which scope it scrolls.
- Tests cover the new contract: tail=N keeps newest N + root, tail=0 is
  root-only, anchor on a nested reply still walks up, reply cursor
  scrolls older replies page-by-page, since combined with tail filters
  after the cut, and the negative-flag-combination matrix.

Out of scope: prompt template update to hint at `--thread <id> --tail 30`
on long threads — separate follow-up per the issue.

Co-authored-by: multica-agent <github@multica.ai>

* fix(comments): only emit reply cursor when older reply exists (MUL-2421)

The thread-tail path emitted `X-Multica-Next-Before` whenever the page
filled to exactly the requested reply count, even when there was nothing
older to scroll to. So `--thread <root> --tail 3` on a thread with
exactly 3 replies sent a cursor that, when followed, returned just the
root — a wasted round-trip that surfaced as a phantom "older replies"
affordance in the agent prompt.

Switch to a `reply_limit + 1` probe: ask the SQL for one extra row, trim
the oldest overflow before responding, and only emit the cursor when an
older reply actually existed. The exact-boundary case (replyCount ==
tail with no overflow) now returns no cursor.

Also documents `--thread/--tail/--recent/--before` and the cursor
semantics in CLI_AND_DAEMON.md, which was the second must-fix in the
MUL-2421 review.

Co-authored-by: multica-agent <github@multica.ai>

* fix(comments): suppress reply cursor when --since covers older replies (MUL-2421)

In the thread + tail + since path the server still emitted a reply cursor
whenever there was an older reply on disk, regardless of `since`. If the
oldest retained reply on the page was already `<= since`, every older
reply was guaranteed to be filtered out too, so the next page only ever
returned the root — wasting round-trips until the agent walked the whole
pre-`since` history. Mirror the recent + since suppression: when
`replies[0].CreatedAt <= since`, drop the cursor.

Test covers the exact case from Elon's review: tail=2 overflow, body
keeps a fresher reply, but the cursor target (oldest retained reply) is
already past `since` — header must be empty.

Co-authored-by: multica-agent <github@multica.ai>

* feat(prompt): default comment-trigger reads to --thread --tail 30 (MUL-2421)

Comment-triggered agents previously defaulted the trigger-thread read to
the unbounded `--thread <id> --output json`, which dumps the full thread
into the prompt — exactly the kind of context bloat MUL-2387 fixed at the
cross-thread layer but never bounded inside a single thread.

Use the new `--tail` flag landed earlier in this PR (server + CLI) as the
default for both the per-turn prompt and the runtime-config Workflow:

- `--thread <trigger-id> --tail 30 --output json` is the new default.
  Root is always included so "what is this about" context survives.
- If 30 replies aren't enough, the prompt now spells out the reply
  cursor: re-feed the stderr `Next reply cursor: --before <ts>
  --before-id <reply-id>` pair back to walk older replies.
- `--recent 20` stays as the cross-thread background fallback, with an
  explicit callout that the same `--before` / `--before-id` flags walk
  *threads* (not replies) in that mode.
- Available Commands core line now surfaces `--tail N` and both stderr
  cursor labels so non-workflow callers also discover the flag.
- `--since` callouts reflect the post-MUL-2421 combinable mode names
  (`--thread --tail` / `--recent`).

Tests (`prompt_test.go`, `execenv_test.go`) pin the new defaults and add
a regression guard against the unbounded `--thread` recipe sneaking back
in.

Co-authored-by: multica-agent <github@multica.ai>

---------

Co-authored-by: multica-agent <github@multica.ai>
2026-05-21 13:43:15 +08:00
Bohan Jiang
e19f7967b9 feat(prompt): thread-first comment reads for agent runs (MUL-2387) (#2816)
* 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>
2026-05-19 14:42:35 +08:00
Bohan Jiang
6f5fbb7813 feat(comments): thread-aware list with composite cursor (MUL-2340) (#2787)
* feat(comments): thread-aware list with composite cursor (MUL-2340)

Adds three optional query params to GET /api/issues/{id}/comments and the
matching `multica issue comment list` flags:

- `thread=<comment-uuid>` resolves the anchor to the thread root via a
  recursive CTE (defends against any future nested replies) and returns
  root + all descendants chronologically. Anchor can be any comment in
  the thread, root or reply.
- `recent=<N>` returns the newest N comments for the issue, ordered
  chronologically in the response.
- `before=<RFC3339>` + `before-id=<uuid>` form a composite cursor for
  stable pagination of `recent`. Both must be set together; a
  timestamp-only cursor is rejected because ties on `created_at` would
  let the existing `(created_at ASC, id ASC)` total order skip or
  duplicate rows across pages.

Flag combination rules: `thread` is exclusive with `recent` and the
cursor; both may combine with `since`. Server and CLI enforce the same
matrix; the CLI fails fast locally so callers don't pay for a 400
round-trip.

Default behaviour (no params) is unchanged — full chronological dump
capped at commentHardCap — so the desktop UI and existing `--since`
polling are untouched. Agent prompt updates land in a follow-up PR so
the new CLI capabilities ship and bake first.

Co-authored-by: multica-agent <github@multica.ai>

* fix(comments): reject cursor without recent and align CLI/server on invalid --recent (MUL-2340)

Elon's PR #2787 second review flagged two gaps in the flag combination
matrix:

- server: GET /comments?before=...&before_id=... without `recent` was
  silently dropped by fetchCommentsForList (RecentN=0 fell through to
  the default / since path), so callers got the full timeline instead
  of the documented "before X" semantics. Now returns 400.
- CLI: --recent 0 / --recent -3 were collapsed with "flag not passed"
  by `recent > 0`, so an explicit invalid value silently fell back to
  the default list. Switched to Flags().Changed("recent") so explicit
  non-positive values fail loudly. Also enforces that --before /
  --before-id only appear with explicit --recent (mirrors the new
  server-side rule).

Tests:
- server flag matrix gains `before + before_id without recent → 400`.
- CLI gains TestRunIssueCommentListFlagGuards covering `--recent 0`,
  `--recent -3`, cursor-without-recent, and the thread/recent
  exclusivity path under the new Changed()-based check. The mock
  server fatals if a request reaches /comments, proving the guards
  fire before any HTTP round-trip.

Co-authored-by: multica-agent <github@multica.ai>

* feat(comments): make `recent` thread-grouped with a thread cursor (MUL-2340)

Bohan pushed back on the row-based `recent=N` shape: comments form a tree,
not a list, and the newest N rows can come from N unrelated threads, giving
the agent N disjoint conversational tails. Replace the row-based query with
a thread-grouped one before #2787 merges so we never ship the wrong shape:

- `recent=N` now returns the N most recently active threads (root + every
  descendant per thread). A thread's recency is MAX(created_at) across its
  whole subtree, so a stale-but-recently-replied thread outranks an old
  quiet one — exactly the property row-recent loses.
- The cursor is now a *thread* cursor: `before` = a thread's
  last_activity_at, `before_id` = its root comment id. The pair walks
  threads strictly less recent than the page's oldest-active thread. The
  cursor surfaces via `X-Multica-Next-Before` / `X-Multica-Next-Before-Id`
  response headers (empty when there are no older threads); the CLI
  forwards the same pair to stderr after listing.
- Row-based `recent` is gone — there is no internal caller and the prompt
  update has not shipped yet, so there is no compat surface to preserve.
- Response body shape unchanged (flat JSON array, chronological). Default
  and `--since` paths untouched. Desktop UI keeps working.

Tests:
- recent=1 returns the freshest-active thread fully; recent=2 returns both
  with the older-active thread first (oldest-active → freshest tail).
- Stale-but-fresh: a thread whose root is older but has a fresh reply
  outranks a thread whose root is newer but quiet.
- Cursor headers emitted only on full pages; empty on the final page.
- Pagination walks threads root2 → root1 → empty, no skips/duplicates.
- Tie-break: three threads sharing last_activity_at paginate one-at-a-time
  using (last_activity_at, root_id) ordering — verifies the timestamp-only
  cursor failure mode is fixed for the thread case too.

Co-authored-by: multica-agent <github@multica.ai>

---------

Co-authored-by: multica-agent <github@multica.ai>
2026-05-18 19:28:26 +08:00