align-family

name	align-family
description	Drive the full migration for an op family — audit, delegate per-op alignment to align-op, run cross-op cleanup. Two terminal outcomes: SUCCESS opens a PR; CLEANUP_REGRESSION exits blocked without a PR when post-cleanup tests fail.

Arguments

Family name from tileops/manifest/ (e.g., reduction, norm, attention).

Contract

• Input: family name
• Output (two terminal outcomes):
  • SUCCESS: PR URL + final report — all ops processed via align-op (promoted or blocked), cleanup succeeds, PR opens.
  • BLOCKED: blocked report (no PR) — reached when CLEANUP detects a regression in a promoted op's tests after dual-path removal; see CLEANUP_REGRESSION terminal in the state diagram. Distinct from the non-terminal per-op REPORT_BLOCKED state.
• Termination: all ops processed (promoted or blocked via align-op) and either (a) CLEANUP + CREATE_PR succeed, or (b) a promoted op's tests fail after CLEANUP's dual-path removal, causing the run to exit via CLEANUP_REGRESSION with the regression recorded. (REPORT_BLOCKED is the non-terminal per-op blocked state and never terminates the run.)

Trust Model

• align-family delegates every per-op stage to align-op, invoked as a separate sub-agent per op. The family orchestrator never runs any atomic per-op skill directly — those live inside align-op's contract.

• align-family does not write tileops/manifest/. After the refactor, align-op is the sole manifest writer (at its own FLIP_STATUS step); align-family observes status transitions via align-op's SUCCESS return. No align-family stage edits, modifies, or flips the manifest.

• Directly-invoked sub-skills of align-family are exactly two: audit-family (in AUDIT) and align-op (per op).

  Stage	Sub-skill
  AUDIT	audit-family
  ALIGN_OP	align-op

Workflow

stateDiagram-v2
    [*] --> AUDIT
    AUDIT --> GROUP_BY_BASE: gap report generated
    GROUP_BY_BASE --> ROUTE: ops grouped by base class
    ROUTE --> ALIGN_OP: ready (mode=minor) or semantic_gap (mode=redesign)
    ROUTE --> REPORT_BLOCKED: classification=blocked (audit-family)
    ALIGN_OP --> CLEANUP_GATE: align-op SUCCESS
    ALIGN_OP --> REPORT_BLOCKED: align-op BLOCKED
    REPORT_BLOCKED --> CLEANUP_GATE: record blocked reason
    CLEANUP_GATE --> ROUTE: group incomplete, next op
    CLEANUP_GATE --> CLEANUP: all siblings promoted or blocked
    CLEANUP --> ROUTE: legacy path removed, next group
    ROUTE --> CREATE_PR: all ops processed
    CLEANUP --> CLEANUP_REGRESSION: promoted op test fails after cleanup
    CLEANUP_REGRESSION --> [*]: terminal blocked, no PR
    CREATE_PR --> [*]

Orchestrator Discipline

Clean worktree between sub-agents

After each sub-agent returns and before dispatching the next, verify:

test -z "$(git status --porcelain)"

This catches tracked changes, staged changes, AND untracked files. If not clean: the sub-agent's commit failed (pre-commit hook, staging issue) or left new files uncommitted. Orchestrator commits on behalf, then proceeds. Every agent must start with a clean worktree.

Dual-path is acceptable during migration

When align-op rewrites a base class during its per-op pipeline, it may create a dual-path __init__ (legacy + spec) to keep unmigrated sibling tests passing. This is correct temporary debt — the cleanup gate removes it.

Dual-path definition: a class __init__ with runtime branching to support two incompatible construction interfaces, and forward dispatching to two execution paths. Not polymorphism — same semantics, temporary interface coexistence.

Steps

1. AUDIT

/audit-family <family>

Gap report written to .foundry/migrations/<family>.json.

2. GROUP_BY_BASE

Group ops by base_class from the gap report. Each group is a set of sibling ops sharing a base class. Process groups in order; within each group, process ops in order (first op likely fixes the base class, subsequent ops validate).

base_class is a required field in the gap report. audit-family must populate it for every op entry. If an op inherits Op directly (no intermediate base class), its base_class is "Op" — these ops form a single group but are independent (no shared base class to rewrite, so cleanup gate is a no-op for this group).

Track group completion: a group is complete when all its ops are promoted or blocked.

3. ROUTE

Read the gap report from AUDIT. For each op in the current group, route by classification (the field audit-family populates):

Gap-report classification	Action	Why
ready	→ ALIGN_OP with --mode=minor	Existing code already conforms; align-op's minor path runs the spec tests (DONE_SKIP since they pass), then the shared downstream + flip.
semantic_gap	→ ALIGN_OP with --mode=redesign	Family-scoped historical migration treats every semantic_gap op as a structural redesign by default — legacy code is being replaced wholesale. For per-op semantic_gap cases that are actually minor manifest deltas, use single-op align-op <op> --mode=minor directly instead of align-family. A future recommended_mode gap-report field could refine the routing automatically.
blocked	→ REPORT_BLOCKED with audit's reason. Skip align-op.	Audit determined the op cannot be migrated autonomously (no pytorch_equivalent, kernel-layer change required, etc.). No per-op work to do.

The mapping is deterministic — align-family MUST pass --mode= explicitly so align-op never falls into its interactive prompt branch in a batch family migration.

4. ALIGN_OP (per op)

For each op routed here, invoke align-op as a separate sub-agent with the mode determined in Step 3:

align-op <op_name> --mode=<minor|redesign>

align-op owns the entire per-op pipeline internally — its internal stages (classify, dispatch on case, test / implement / bench, revalidate, flip status, cleanup, report) are align-op's contract, not align-family's. See align-op/SKILL.md for the authoritative stage list and the conditional-IMPLEMENT rule. align-family does not manage or observe align-op's internal stages; the only interface between them is align-op's SUCCESS / BLOCKED return.

Per-op outcome:

• align-op returns SUCCESS → op is promoted (manifest status already flipped by align-op's FLIP_STATUS). Record the returned report. Proceed to CLEANUP_GATE.
• align-op returns BLOCKED → op is blocked. Capture align-op's BLOCKED reason verbatim as the per-op result. Proceed to CLEANUP_GATE.

align-family MUST NOT re-flip manifest status or re-run per-op validation on its own; align-op's SUCCESS return is the single source of truth that the manifest was flipped.

The flip performed by align-op MUST stay within the Status flip carve-out; align-family MUST NOT batch contractual-field edits across ops in the same PR.

5. CLEANUP_GATE

After each per-op outcome — whether align-op returned SUCCESS / BLOCKED or ROUTE recorded an audit-classified blocked op directly to REPORT_BLOCKED — check group completion:

• All siblings in the current base-class group are promoted or blocked? → trigger CLEANUP
• Otherwise → continue to next op (ROUTE → ALIGN_OP)

6. CLEANUP

Remove dual-path legacy code from the base class. This step fires once per base-class group, after all siblings have gone through align-op (SUCCESS or BLOCKED).

Actions:

1. Remove legacy __init__ branch (if M is not None and N is not None path)
2. Remove _legacy flag and _forward_legacy method
3. Remove M, N keyword-only parameters from __init__
4. Run tests and --check-op for promoted ops only (blocked ops' tests may legitimately fail)
5. Commit cleanup changes

If any promoted op's test fails after cleanup → transition to CLEANUP_REGRESSION (terminal): record the regression, skip CREATE_PR, exit with blocked status. Do not proceed with a broken state.

Two distinct blocked states, split so the diagram has one meaning per state:

• REPORT_BLOCKED — per-op align-op returned BLOCKED. Records the reason, returns to CLEANUP_GATE, continues with sibling ops. Non-terminal.
• CLEANUP_REGRESSION — a promoted op's tests fail after CLEANUP's dual-path removal. Terminal: the family migration exits without opening a PR. The blocked report becomes the run's final artefact.

Timeout policy for blocked ops: if a group has blocked ops that prevent the cleanup gate from firing for an extended period, the orchestrator may force cleanup — remove legacy path and mark blocked ops' tests as xfail. This is a human decision, not automatic.

7. CREATE_PR

After all ops processed:

• Collect all per-op reports returned by align-op
• Create PR with:
  • Migration summary (promoted / blocked counts)
  • Per-op change table (derived from align-op reports)
  • Observations surfaced by align-op (e.g., needs_kernel_work, needs_human_decision) for human doc review
  • Blocked ops with align-op's BLOCKED reasons