Phase 2: create of an existing group is first-arrival-wins, not fold-based #165

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   dezren39

   on Oct 12, 2026
2. dezren39 commented on Oct 24, 2026

   

   dezren39

   on Oct 24, 2026

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   id train triage (2026-10-24): too-big-needs-design — fold-based group create; the correct check belongs in src/groups/fold.rs, which is not wired into ingest yet.
3. dezren39

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   on Oct 29, 2026
4. dezren39 commented on Oct 29, 2026

   

   dezren39

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   🤖 Agent note · picked up

   • Agent: queue worker (repo-worker-code), Lane A shift
   • Session / ID: queue task 2014
   • Found via: queue claim · repo-health-code-pilot
   • Task: Triage Phase 2: create of an existing group is first-arrival-wins, not fold-based #165 — verify at current main whether create-of-an-existing-group is still refused by arrival order outside the groups fold (replica divergence / friendship-ID claim), or whether the fold is now wired into ingest and settles concurrent creates deterministically; route a scoped fix or close with evidence.
   • Expectation: effort s — done = triage verdict posted, follow-up enqueued or issue closed with evidence, task 2014 completed.
   • Links: issue Phase 2: create of an existing group is first-arrival-wins, not fold-based #165
5. dezren39 commented on Oct 29, 2026

   

   dezren39

   on Oct 29, 2026

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   🤖 Agent note · done (triage verdict: CONFIRMED)

   • Agent: queue worker (repo-worker-code), Lane A shift
   • Session / ID: queue task 2014 (triage)
   • Found via: queue claim · repo-health-code-pilot
   • Task: Triage complete — CONFIRMED at current main (HEAD 2953f27), routed to a scoped fix packet (queue task 2950).
   • Evidence:
     • The "wiring fix" is commit d5ec382 ("a create may not take over an existing group [P2.3]") and it is unchanged at HEAD: pkgs/id/src/membership/gate.rs:53-63 — for a create, admit() scans the operations applied so far and rejects GroupExists only if one names the same group; the doc comment (gate.rs:26-28) says it plainly: "The first create stands."
     • pkgs/id/src/membership/layer.rs:130-166: Membership::receive decides in arrival order (held only for missing causal dependencies). Two concurrent creates for one group — neither causally before the other — are settled by whichever arrives first at that node. No event-ID tie-break exists in this path.
     • The deterministic replays that do exist do not agree on a tie-break, and neither is consulted at admission: the groups fold orders concurrent events by smaller event ID (fold.rs header), while the event store's resolve.rs:108,186-213 replays a fresh membership layer in stored position-key order (author||seq||id, event_store/mod.rs:26) — for the same concurrent pair the two paths can crown different creates. Ingest stores and resolve replays; it never consults groups/fold.rs.
     • The friendship-ID claim is reachable: layer.rs:692 pins that a create may name a derived friendship group ID, so a stranger's create naming that ID is admitted whenever it is processed first. The only GroupExists test (layer.rs:725) is sequential — create, then stranger — and no test feeds concurrent creates in both arrival orders.
   • Expectation: fix task 2950 (small_fix, dedupe repo-health:v1:fix:developing-today/code:issue:165) — done = one canonical rule (causal order, smaller event ID wins, matching the fold) decides concurrent creates on the membership layer, the fold, and resolve; convergence tests in both arrival orders; CI green.
   • Links: follow-up task 2950 · gate https://github.com/developing-today/code/blob/main/pkgs/id/src/membership/gate.rs
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   on Oct 29, 2026
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9. dezren39 commented on Nov 2, 2026

   

   dezren39

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   agent-note:v1 — state: parked (task 2950, OpenChamber scheduled lane)\n- Agent: repo-worker-code.\n- Fresh metadata-only evidence: #165 remains OPEN/assigned to Drew; canonical PR #4099 remains OPEN/authored by Drew. I did not inspect PR contents, checks, reviews, branch, or worktree.\n- Disposition: parked 30 minutes; no competing work. Parked labels restored; work/assigned remains.\n- Resume: only after explicit ownership release or handoff; then revalidate before work.\n
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    on Nov 2, 2026
11. dezren39 commented on Nov 2, 2026

    

    dezren39

    on Nov 2, 2026

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    🤖 Agent note · picked up

    • Agent: queue worker (repo-worker-code), lane D shift
    • Session / ID: task 2950
    • Found via: queue claim
    • Task: Correction to the metadata-only parks on task 2950: PR fix(id): canonical winner for concurrent group creates (#165) #4099's head branch is queue/2950-165-concurrent-create-winner — PR fix(id): canonical winner for concurrent group creates (#165) #4099 is task 2950's OWN fleet PR, not a Drew-owned PR (the author login is the shared fleet account). The ownership stop does not apply. This shift verifies head 441f857 (Codex P1 already fixed in d307468; remaining P2 dispositioned deferred by lane A) and merges if tests pass.
    • Expectation: effort/s; done = PR fix(id): canonical winner for concurrent group creates (#165) #4099 merged, issue Phase 2: create of an existing group is first-arrival-wins, not fold-based #165 closed, task 2950 completed fixed_merged.
    • Links: PR fix(id): canonical winner for concurrent group creates (#165) #4099
12. dezren39

    added a commit that references this issue on Nov 2, 2026

    fix(id): canonical winner for concurrent group creates (#165) (#4099)

    ...

    c9c2578
13. dezren39 commented on Nov 2, 2026

    

    dezren39

    on Nov 2, 2026

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    🤖 Agent note · done

    • Agent: queue worker (repo-worker-code), lane D shift
    • Session / ID: task 2950
    • Found via: queue claim
    • Task: Task 2950 complete: PR fix(id): canonical winner for concurrent group creates (#165) #4099 MERGED (squash, merge commit c9c2578), issue Phase 2: create of an existing group is first-arrival-wins, not fold-based #165 closed. Concurrent group creates now resolve by deterministic canonical order instead of first arrival.
    • Expectation: Verified fresh this shift: PR fix(id): canonical winner for concurrent group creates (#165) #4099 is task 2950's own fleet PR (head queue/2950-165-concurrent-create-winner @ 441f857) — the earlier Drew-owned parks were the author-login metadata over-fire, corrected on the pickup note. Codex findings all dispositioned (P1 winner-ordering fixed in d307468; rescan P2 fixed; replay-indexing P2 deferred to tracked issue perf(id): index membership replay outcomes instead of scanning (PR #4099 Codex follow-up) #4128). Laptop tests at head: id-core membership 98 passed; id lib resolve (causal_order) 20 passed. PR CI still queued at merge (Actions runner backlog); main CI is the backstop.
    • Links: PR fix(id): canonical winner for concurrent group creates (#165) #4099; follow-up issue perf(id): index membership replay outcomes instead of scanning (PR #4099 Codex follow-up) #4128
14. dezren39

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15. dezren39

    closed this as completedon Nov 2, 2026