[milestone Milestone 12 — Symbolic Reasoning Core] Constraint synthesis helpers — `internal/synthesis`: `SynthesizeInvariant(prec...

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Repo: WasmAgent/symkernel
Milestone: Milestone 12 — Symbolic Reasoning Core: Z3 Integration (Phase 1b)
Bullet:

Constraint synthesis helpers — internal/synthesis: SynthesizeInvariant(precondition, postcondition string, loopBody []byte) (string, error) combining symbolic execution with Z3 to suggest loop invariants; useful for policy verification

Relevant code context (from worktree)

new (does not exist yet): internal/synthesis
contains 'constraint': ""/tmp/tmp.ufhVOKX3Uq"/wasmagent-js"/packages/capability-compiler/src/mcpSchema.ts
contains 'constraint': ""/tmp/tmp.ufhVOKX3Uq"/wasmagent-js"/packages/capability-compiler/src/recordingPolicy.ts
contains 'constraint': ""/tmp/tmp.ufhVOKX3Uq"/wasmagent-js"/packages/compliance/src/ir/ConstraintIR.test.ts
contains 'synthesis': ""/tmp/tmp.ufhVOKX3Uq"/wasmagent-js"/packages/core/src/agents/ToolCallingAgent.ts
contains 'synthesis': ""/tmp/tmp.ufhVOKX3Uq"/wasmagent-js"/packages/core/src/agents/AgentTeam.ts
contains 'synthesis': ""/tmp/tmp.ufhVOKX3Uq"/wasmagent-js"/packages/core/src/agents/ToolCallingAgent.test.ts
contains 'helpers': ""/tmp/tmp.ufhVOKX3Uq"/wasmagent-js"/packages/aisdk/src/codemodeExecutor.ts
contains 'helpers': ""/tmp/tmp.ufhVOKX3Uq"/wasmagent-js"/packages/claude-agent-sdk/src/index.ts
contains 'helpers': ""/tmp/tmp.ufhVOKX3Uq"/wasmagent-js"/packages/cloudflare-worker/src/db.test.ts

Implementation note: Files marked "new (does not exist yet)" must be created from scratch. verify-first should return PROCEED (not NOT_YET) — there is no prerequisite blocking this work.

Acceptance criteria

• Command go build ./... passes
• The specific work described in the bullet above is implemented in the smallest number of files required.
• No unrelated files touched (git status --short output limited to the intended change).

Notes for the implementer

This issue was auto-created by SweepMilestoneBulletToIssue. The bullet text is verbatim
from the milestone doc. If ambiguous or too large for a single implement cycle,
verify-first should return NEEDS_SPLIT with sub-issue proposals or NEEDS_HUMAN with the blocker.

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