Fulcra Agent Continuity

Fulcra Agent Continuity

Enhances the fulcra-agent-teams skill. Teams already uses member/<agent>/progress.md to survive isolated cron/heartbeat runs, but it's freeform — a fresh session has to re-read prose and guess what mattered. This skill adds a structured snapshot (objective, decisions, next actions, open questions, artifacts, context-used-%) and a deterministic resume brief, so waking up is reliable instead of a re-read.

Whether/when to snapshot is a judgment call (prose); building the schema and folding many snapshots to the newest is deterministic (the coord-engine tool).

The lifecycle contract (applies on every harness)

Any agent participating in a team space owes these four behaviors. Harness adapters (see fulcra-agent-automation §Harness adapters) automate them where the platform allows; where it doesn't, follow them as prose:

1. On wake (new session, cron fire, heartbeat, automation tick): coord-engine continuity resume <team> <agent> and read your inbox (coord-engine inbox <team> --agent <agent>) BEFORE taking new work.
2. On material change (a decision made, an artifact produced, a task claimed or finished) and at least hourly while actively working: coord-engine continuity snapshot <team> <agent> <task> --objective … [--decision …] [--next …].
3. Before context loss (compaction, model handoff, session end): coord-engine continuity park <team> --agent <agent> --objective "<one line>" — parks every held role with a checkpoint. Handing off to a successor session? The checkpoint's CONTENT has rules of its own — see Parking for a successor.
4. Inbox cadence: while live, read your queue and inbox at least every 30 minutes. If your platform has a durable scheduler, arm ONE scheduled wake that runs coord-engine queue <team> --agent <you> instead of trusting yourself — a schedule, never a resident listener (those are retired; see the pickup note below).

An agent that beats presence but has no fresh snapshot is flagged continuity-stale by coord-engine health.

Timeline visibility: the checkpoint channel

Every successful continuity snapshot and continuity park also emits one moment to the account's Agent Checkpoint channel, so a human watching the Fulcra timeline sees the fleet checkpointing instead of inferring it from files nobody opens. The moment carries the same four-dimension identity tags a bus event does (agent: / platform: / harness: / model: plus the base tag), from the same tags.json registry — one bus-v3 tag-provision covers both. Its note is compact JSON:

{"v":1,"kind":"checkpoint","agent":"amy","task":"role-reviewer",
 "objective":"first 140 chars of the objective",
 "path":"team/r/member/amy/continuity/role-reviewer/latest.json"}

objective is a hard 140-character slice (no ellipsis) — the note is a timeline label and the snapshot at path holds the full text.

Reads never emit. resume, checkpoint --role, and briefing are pure reads; a moment for a read would claim state was saved when nothing was.

Emission is driven by one document, team/<team>/_coord/bus-v3/checkpoints.json (separate from records.json on purpose — old engines fail their queue closed on a bus authority carrying fields they do not know; see bus v3 setup step 5). With no such document the engine emits nothing and says nothing, so pre-adoption teams see no change at all. Malformed bytes are loud every time and are never auto-repaired.

The fail-open rule (deliberately the inverse of park's)

park is loud and non-zero when it cannot write a checkpoint (CHECKPOINT NOT WRITTEN) — park runs as a session exits, so a silent no-op discards the state the next session wakes on while nobody is watching.

Emission is the opposite:

The checkpoint file is the source of truth. The moment is its shadow.

Absent config, malformed config, an unreadable store, a refused or raising record write — every one of them still writes the checkpoint, prints one line on stderr (silence in the absent case), and leaves the exit code unchanged. Losing the shadow costs a row in a visualization; failing the park over it would cost the checkpoint itself. Never read a checkpoint moment: line as a failed park — the park's own rc and its parked <role> -> <path> lines are what say whether state was saved.

Which adapter automates this for you

Pickup column note (bus v3, 2026-07-27): resident listeners are retired — pickup is now the v3 queue read (coord-engine queue <team> --agent <you>) on each scheduled wake (docs/coord/BUS-V3.md). Listener entries below describe the pre-v3 mechanism; keep the schedule, replace the listener tick with a queue-reading wake.

Where to start — the re-entrancy probes

On waking (fresh session / cron), before doing anything else, probe whether a resume brief already exists for you. Enter at the first probe that fails (per the repo's skill-quality pattern, docs/skill-quality-pattern.md); a snapshot is a single-file overwrite and resume is a pure read, so re-entry is always safe:

Snapshot present → read the printed brief (objective / next actions / open questions / decisions) and resume that work. resume <team> <agent> <task> narrows to one task; the bare resume <team> <agent> form folds to the newest across all your tasks. Both are pure reads — safe to re-run any time.

Snapshot schema (member/<agent>/continuity/<task>/latest.json)

{ "schema": "coord.teams.continuity.v1",
  "checkpoint_id": "CHK-<iso>-<task>",
  "agent": "user", "task": "build-l6",
  "objective": "ship the continuity layer",
  "decisions": ["chose structured json over freeform"],
  "next_actions": ["land the PR", "write the skill"],
  "open_questions": ["fold across tasks or per-task?"],
  "artifacts": ["https://github.com/.../pull/5"],
  "context_used_percent": 40, "transcript_path": null,
  "created_at": "2026-07-01T18:00:00Z" }

Usage

# take a snapshot (e.g. before context runs out, at a natural stopping point, or on session end)
coord-engine continuity snapshot <team> <agent> <task> \
    --objective "ship the continuity layer" \
    --next "land the PR" --next "write the skill" \
    --open-question "fold across tasks or per-task?" \
    --decision "chose structured json" --context-percent 40

# on waking (fresh session / cron), get a resume brief — deterministic, not a prose re-read
coord-engine continuity resume <team> <agent> <task>
coord-engine continuity resume <team> <agent>          # newest across all the agent's tasks
coord-engine continuity resume <team> <agent> --max-age 1h  # fail rc 2 if missing/stale

Role checkpoints, park, and briefing (A6)

coord-engine continuity checkpoint <team> --role <r> [--ref PATH]  # get/set the role's durable resume point
coord-engine continuity park <team> [--agent X] [--role R] [--objective "…"]  # session exit: snapshot every held role (or just R) + set its checkpoint_ref
coord-engine briefing <team> [--agent X] [--json]                  # session start: presence + board + inbox + needs-me + pending reviews + latest snapshot in ONE call

• park is the session-exit verb: each role you hold (fresh lease) gets a snapshot and the role doc's checkpoint_ref points at it — the next holder (or your next session) resumes from there via checkpoint --role. --role R narrows it to exactly one role (you must hold a fresh lease on R); with no flag it parks every held role. Use --role to confine a park to a dedicated role without touching your other roles' checkpoints — that is how acceptance pair parks safely against a loaded team store. It exits rc 2 with CHECKPOINT NOT WRITTEN when you hold no fresh roles (or, under --role, no fresh lease on that one), and rc 1 with the same CHECKPOINT NOT WRITTEN banner when the role state was unreadable rather than empty — retry that one before ending the session. Success therefore proves at least one checkpoint was written. Each written checkpoint also emits one timeline moment — see the checkpoint channel; that emission can never change park's exit code.
• resume prints checkpoint age on every read. JSON adds the derived checkpoint_age_seconds field without changing the stored snapshot. With no snapshot, JSON is the explicit object {"snapshot":null,"checkpoint_age_seconds":null,"error_code":null} (not bare null). A timestamp up to one second ahead is treated as zero-age clock skew; farther-future created_at is invalid/unknown age and fails freshness like an unparseable timestamp. --max-age DURATION accepts seconds/minutes/hours/days (30s, 15m, 12h, 2d) through 999999999d. It exits rc 2 when the duration is invalid, the age is unknown, or the checkpoint exceeds the bound; JSON distinguishes those branches as invalid-max-age, checkpoint-age-unknown, and checkpoint-stale in error_code (successful reads carry null).
• briefing is the session-start verb and tolerates absent add-ons — with no presence/directives installed the sections are simply empty; it never fails a cold start.

Parking for a successor (handoff doctrine)

A checkpoint is a promise to whoever wakes on it. One handoff (2026-07-22, an agent resume) cost the successor its first hour reconciling three candidate repo homes because the parked snapshot asserted state that was never pushed. Rules, each earned there:

• Never park asserting repo/artifact state you have not pushed AND verified. "Verified" means an independent read-back of what the remote actually holds: git ls-remote on the exact ref compared against the exact hash you claim is there, or an equivalent remote fetch/download. Not the memory of having pushed — and not a git push --dry-run, which only tests a prospective push (it is the write-permission preflight in the checklist below, never proof the remote has your state). If the migration/import is still pending when you must park, the snapshot says so explicitly: IMPORT NOT DONE, followed by the exact recipe the successor runs (the literal mirror-push/clone commands) and the access prerequisites (who must grant what, before those commands can succeed).

• One canonical home per artifact. Name exactly one target repo/path for each piece of parked work. A checkpoint that names two candidate homes hands the successor a research task, not a resume.

• The role doc exists before you park. A parked role whose team/<team>/roles/<role>.md is missing leaves the successor claiming into a warning with review role-routing broken — creating it is the PARKING agent's job, not the successor's (see fulcra-agent-roles, "Establish a role").

• Carry an operator pre-flight checklist. Every human unlock your successor's bootstrap will need, enumerated in the parking doc so the operator grants them in ONE pass instead of the successor discovering them serially by failure (that same handoff burned ~6 round-trips this way). Template:

  ## Operator pre-flight (grant BEFORE waking the successor)
  - [ ] Network egress: `fulcra.us.auth0.com` + `api.fulcradynamics.com`
        allowlisted in the session's environment (GET-ON-THE-BUS §3).
  - [ ] Auth tap: operator reachable for one device-flow approval
        (token cache does not survive a fresh container).
  - [ ] Source-repo access: repo(s) attached to the session AT START
        (cloud sessions are repo-scoped: account-level GitHub access does
        NOT reach them, cross-owner add_repo is unsupported — plan
        initial-source / mirror-push / same-owner fork; HARNESS-MAP wall 11).
  - [ ] Write permission: the successor's credential can PUSH the target
        repo — whichever access path applies (GitHub App grant, deploy key,
        or a scoped project-bot credential managed in your team's secret store) —
        verified with a `git push --dry-run` probe, not by assumption.
  

When to use

• Before context runs low or at a natural stopping point — capture what you'd need to resume.
• On session end / hand-off — the next session (or another agent picking up the work) resumes clean.
• In a cron/heartbeat wake payload — call continuity resume first to re-establish state, exactly as fulcra-agent-teams asks agents to read progress.md first, but structured.

Pairs with fulcra-agent-teams' MEMORY.md / heartbeat conventions: keep those, and add a structured snapshot for the work in flight. See references/continuity-cli.md.