cjm-context-graph-layer

Domain-neutral graph-aware layer for context graphs: deterministic node identity, spine and overlay grammar, spine-edit operations with effective-view projection, supersession resolution, idempotent emission/extension, and provenance-by-declaration.

Modules

• cjm_context_graph_layer.declare — Provenance-by-declaration: host logic stays readable Python in the workflow core and DECLARES its provenance contributions as a Derivation event node (+ DERIVED_FROM input edges, PRODUCED output edges). This recovers audit completeness without the substrate executing host logic (pass-2 Thread 4's false-dichotomy resolution). The substrate stays untouched: declarations read composition/job ids from the outside.
• cjm_context_graph_layer.edits — The spine-edit operation vocabulary (prune / replace_text / boundary_shift) + supersession resolution + the effective-view projection. These are generic operations on any NEXT-chained text spine; correction workflows carry them in overlay-node payloads, and the projection interprets them at read time (migrates correction-core C11/C16 onto the layer).
• cjm_context_graph_layer.grammar — The domain-neutral context-graph grammar: spine relations (NEXT / PART_OF / STARTS_WITH, recurring fractally at every layer), overlay relations (SUPERSEDES / DERIVED_FROM / PRODUCED), root kinds, and the standardized attribution fields.
• cjm_context_graph_layer.identity — Deterministic node/edge identity: UUIDv5 over canonical identity tuples (stage-5 ratified rule: a node's id derives from what makes it THE same node across re-derivation, never from its correctable content).
• cjm_context_graph_layer.journal
• cjm_context_graph_layer.ops — Queue-touching layer operations: the shared graph_task helper (task channel), idempotent emission (emit-if-absent + verify-if-present), and extend_graph — the one primitive every graph-extending workflow commits through. Deterministic ids (see identity) make idempotency a presence check instead of a search.

API

cjm_context_graph_layer.declare

• Derivation class — One host-logic transformation event, declared for the audit trail.
• derivation_to_graph function — Materialize a declaration as one event node + DERIVED_FROM / PRODUCED edges.

cjm_context_graph_layer.edits

• SpineEdit class — One spine-edit decision, as carried in an overlay node's payload.
• SpineEditError class — A spine edit could not be validated or applied (loud, never silent).
• SpineUnit class — Minimal projection unit: one spine position with its effective text.
• project_effective_spine function — Project the effective view: layer-0 + active edits, resolved at read time.
• resolve_active function — Resolve the active set under append-only supersession.

cjm_context_graph_layer.grammar

• OverlayRelations class — Overlay/derivation relations — the trust grammar shared by every
• SpineRelations class — Structural spine relations, reused fractally at every layer
• attribution function — Standardized attribution fields for derived/asserted nodes.
• grouped_spine_edges function — Spine edges for a fine layer grouped under coarse parents.
• make_edge function — Build an edge wire dict with a deterministic id by default.
• spine_edges function — The uniform spine pattern at any layer: PART_OF child->parent for each

cjm_context_graph_layer.identity

• canonical_part function — Render one identity-tuple part canonically.
• derive_edge_id function — Derive a deterministic edge id from (source, target, relation).
• derive_node_id function — Derive a deterministic node id from a kind + identity tuple.

cjm_context_graph_layer.journal

• genesis_export function — One-time whole-db GENESIS BASELINE: journal every node + edge as genesis ops.
• replay_journal function — Re-apply every journaled op in append order — the db-from-journal rebuild.

cjm_context_graph_layer.ops

• ExtendResult class — Outcome of one idempotent extend_graph commit.
• GraphIntegrityError class — An emitted node collided with an existing node of different identity content.
• extend_graph function — Idempotently extend the graph: emit-if-absent + verify-if-present.
• graph_task function — Invoke a graph-storage adapter method through the queue's task channel.
• node_identity_mismatch function — Verify-if-present check: label + sources content-hash set must match.
• partition_by_presence function — Split wire dicts into absent (to add) and present (to verify).

Dependencies

Depends on: cjm-context-graph-primitives, cjm-substrate Used by: cjm-context-graph-projection, cjm-dev-graph-schema, cjm-markdown-decompose-core, cjm-notebook-decompose-core, cjm-transcript-correction-core, cjm-transcript-correction-tui, cjm-transcript-decomp-core, cjm-transcript-graph-schema, cjm-transcription-core