Files
multica/server
Bohan Jiang aeb284cbeb feat(runtime): teach agents the parent/sub-issue protocol (MUL-2338) (#2918)
* feat(runtime): teach agents the parent/sub-issue protocol (MUL-2338)

Adds a Parent / Sub-issue Protocol section to the runtime brief built by
`buildMetaSkillContent`, emitted whenever the agent is running on a real
Multica issue (assignment- or comment-triggered). Two behaviors are now
documented for every issue-bound agent:

- A. When wrapping up a child issue, post the final result and switch to
  `in_review` on this issue first, then post a single top-level comment
  on the parent. Mention the parent assignee only when it is another
  agent on a still-open parent — never self-mention, never @ member /
  squad, never re-trigger a `done` / `cancelled` parent.
- B. When creating sub-issues, choose `--status backlog` for sub-issues
  that must wait and `--status todo` for the one to start immediately;
  promote with `multica issue status <id> todo` when its turn comes.

The signal is explicitly framed as best-effort — no server-side state
sync, no claim of a guaranteed handshake. The section is skipped for
chat, quick-create, and run-only autopilot runs, which have no
parent/child semantics.

Tests in runtime_config_test.go assert that the section is present in
both issue workflows, absent in the three non-issue modes, and that the
wording does not introduce a non-existent `multica issue list --parent`
command or promise a reliable handshake.

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

* fix(runtime): split Step A of parent/sub-issue protocol by trigger type (MUL-2338)

Comment-triggered runs were inheriting an unconditional
`multica issue status <this-issue-id> in_review` from Step A, which
conflicts with the comment-triggered workflow rule "Do NOT change the
issue status unless the comment explicitly asks for it" (Elon's blocking
review on PR #2918). Step A now branches on trigger type:

- Assignment-triggered: keep "post final results + flip in_review".
- Comment-triggered: complete the reply per the existing workflow rule,
  only flip status when the triggering comment asked for it, and gate
  the parent-notification steps on actually closing out child work.

Tests lock the boundary: comment-triggered briefs must not contain the
unconditional in_review command, must echo the existing status
guardrail inside Step A, and must spell out the "closing out" gate.
Assignment-triggered briefs still carry the unconditional flip.

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

* fix(runtime): simplify parent/sub-issue mention rule to always @ parent assignee (MUL-2338)

Per Bohan's directive on PR #2918: the per-case mention table (same agent /
member / squad / closed parent) is overkill prompt complexity. Replace it
with a single rule: always @mention the parent's assignee using the URL
that matches assignee_type. The platform's existing run dedup handles
re-triggers, and a single rule is easier for agents to follow predictably.

Preserves the existing comment-triggered boundary (Step A still does NOT
add an unconditional in_review flip on comment-triggered runs).

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

* refactor(runtime): compress parent/sub-issue protocol to 3-rule convention (MUL-2338)

Drop the spec-flavored A/B sub-headings and per-case mention table; keep
three numbered rules (close out child, notify parent, pick backlog vs
todo) plus a one-line best-effort preamble. The comment-triggered
branch still re-asserts the "do not change status unless asked"
guardrail and gates parent notification on actually closing out child
work; the assignment-triggered branch still flips to `in_review`.

Section is now 7 lines instead of 29. A new TestParentSubIssueProtocolIsCompact
guards the ≤10-line ceiling so this stays a convention, not a spec.

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

* fix(runtime): make sub-issue creation rule unconditional in parent/sub-issue protocol (MUL-2338)

Elon's review on PR #2918: the preamble previously gated all three
rules on the current issue having `parent_issue_id`, but rule 3
(creating sub-issues) needs to reach top-level parents that have no
parent themselves — that is exactly where the `todo` vs `backlog`
decision matters most. Move the gate from the preamble onto rules 1
and 2 per-rule; rule 3 now applies to any issue-bound run. Section
stays at 7 newlines (≤10).

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

* refactor(runtime): unify parent/sub-issue protocol as mechanism description (MUL-2338)

Drop the if/else split between assignment- and comment-triggered runs in
the Parent / Sub-issue Protocol section: both runs now read the same
two-rule description of how the parent/child mechanism works. The
comment-triggered workflow rule "Do NOT change the issue status unless
the comment explicitly asks for it" naturally short-circuits the parent
notification (no status flip → not closing out the child → skip), so the
protocol no longer needs to branch on TriggerCommentID.

Tests collapse the two trigger-specific cases into one parameterized
test, and the assignment vs comment status-flip invariants are now
anchored on the real workflow command (with substituted issue id)
instead of the protocol's removed `<this-issue-id>` placeholder.

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

---------

Co-authored-by: multica-agent <github@multica.ai>
2026-05-20 16:20:33 +08:00
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