FE-700: Intent graph relation-policy foundation

[lunelson]

Summary

• Adds a relation-policy registry for intent edges with endpoint-relative labels, snapshot buckets, and source/target change-impact behavior.
• Adds read-only intent context snapshots for item neighborhoods and compact whole-graph projection.
• Moves hard-edit cascade and side-chat edit-impact preview onto the same relation-policy incident-edge projection, so preview and apply agree about affected intent items.
• Removes stale downstream-only cascade helpers and updates reconciliation relation lookup to work from either raw edge endpoint.
• Adds docs/next/ architecture work for the Brunch next line: a POC architecture PRD, JSONL session viability spike, plan-graph/Petri orchestration note, source artifacts, and a disposable Petri visualization prototype.

Verification

• npm run verify
• Focused coverage added/updated in knowledge-relationship-policy, context-snapshot, cascade-producer, edit-route, side-chat-route, and reconciliation-need tests.

Notes

• FE-700 relation-policy foundation is ready for review.
• docs/next/ is intentionally design/prototype material: it frames a possible Brunch next architecture and orchestration model, not shipped product truth.
• Broader ontology expansion candidates (invariant, example, richer edge metadata) are intentionally deferred until freshly scoped.

[lunelson]

• FE-700: Intent graph relation-policy foundation #140 👈 (View in Graphite)
• FE-709: Spec/Plan and ADR Reconciliations #139 : 1 other dependent PR (#141 )
• FE-709: Continuous workspace shell #134 : 1 other dependent PR (#138 )
• FE-705: Planning extensions and persistence facade cleanup #133 : 1 other dependent PR (#136 )
• FE-705: Agent CLI capabilities and workflow documentation #132
• main

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[cursor]

PR Summary

Low Risk
Documentation-only changes plus minor repo housekeeping (.gitignore, removing .augment/skills), with no runtime code or data-path impact.

Overview
Introduces docs/design/SPEC_WORKSPACE_GRAPHS.md, a working design proposal that extends the intent-graph concept into four trace-connected graph planes (intent, oracle, design, plan) with shared semantic edges/relation policy, node kinds, status/provenance, and derived impact indexing.

Updates docs/design/README.md to index this new document, adds a placeholder docs/next/README.md, extends .gitignore to ignore .agents/_quarantine, and removes the .augment/skills pointer file.

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[augmentcode]

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[kostandinang]

The PR currently does more than the description suggests. It may be worth updating it to mention the inclusion of speculative documents too.

Latest approval commit e7c2935 is not an ancestor of c217e91, indicating rewritten history after approval