ImpactEdge Tool

1. What this is, how it works, and what this is not

What this is. A working form of the ImpactEdge and evidence schema from the source file. You enter evidence records, link them to calculations, declare impact edges that say what goes stale when a fact changes, and record decisions with an authority check. The tool scores evidence strength, computes edge impact, simulates one-hop invalidation with receipts, checks grade conflicts, and applies the governance intersection from the source.

How it works. Add at least one evidence record, add an edge that names the source fact and its affected outputs, add a calculation that binds an algorithm and version to evidence, then add a decision. Use the propagator to change a fact and watch outputs go stale one hop at a time. Use Share to copy a link that restores this exact state from the URL hash.

What this is not. It is not the N-Cell runtime, not an Organ Manifest registry, not a live data feed, and not a legal or underwriting authority. It does not fetch county records, MLS data, or any external source. It does not prove a fact is true. It only records what you entered, grades it by the schema rules, and shows what depends on it.

Scoring definitions used here (derived, checkable)

• Grade score: county 100, mls 85, listing 70, professional 60, avm 45, seller_claim 30. The order follows the grade list order in the source and rule I4, which says county record beats seller claim.
• Evidence strength: average grade score of all evidence, plus 10 if at least two distinct independence groups are present, capped at 100, minus 15 if an unresolved grade conflict is recorded. Rounded to one decimal.
• Edge impact score: (affected outputs x 10) plus rule weight (I1 5, I2 10, I3 15, I4 10, I5 5) plus 25 if status is stale, minus 10 if status is rolled_back, minimum 0.
• Governance E*: E_proposed intersect E_allowed intersect E_available, exactly as the source writes it: E* = E_proposed ∩ E_allowed ∩ E_available.
• Decision: offer_authorized is true only when a human approval record is present in the authority field. Source rule: a decision without a human approval record has offer_authorized = false. Always.

2. Try it: walkthrough

1. Click Sample 1: ARV cascade below. It loads one county evidence record, one edge, one calculation, and one decision.
2. Read the evidence strength and edge impact score. Check them against the definitions in section 1.
3. In the propagator, pick source fact FACT-ARV-001, enter a new value such as 185000, and click Propagate change. MAO, offer, and CRM note go stale one hop at a time, each with a receipt line.
4. Try the conflict checker: enter the same fact with grade seller_claim against the county record. It blocks the overwrite and records a conflict.
5. Clear the form and load Sample 2 for a cross-organ lien conflict, or Sample 3 for a revoked algorithm and a decision with no authority.
6. Click Copy share link. The link restores this exact state from the URL hash on load.

Samples are synthetic worked examples for the tool. They are not real county records, real sales, or verified facts.

3. Evidence ledger

Evidence record fields, exactly as the source defines them: evidence_id, fact, source_name, source_url, accessed_date, grade, independence_group, data_rights. Two sources owned by the same seller or agent do not corroborate each other. Voter-file contact data is use-then-delete, never retained, never in a receipt. Owner PII never goes in a public receipt.

4. Impact edges

ImpactEdge object, exactly as the source defines it: edge_id, source_fact_id, source_engine, affected_outputs, rule (I1 to I5), created_at, status (active, stale, rolled_back).

Propagator: change a fact, invalidate one hop at a time

Rule I1: a new fact invalidates, never silently updates. Rule I2: invalidation propagates one hop at a time, with receipts.

Conflict checker: rule I4

A fact with a lower source grade never overwrites a higher-grade fact. County record beats seller claim.

5. Calculations

Calculation record, exactly as the source defines it: calculation_id, algorithm, algorithm_version, verifier, inputs (evidence_ids), output, computed_at, revocation_check (algorithm version still current, yes or no). A calculation with no algorithm binding is free-form text, not a calculation. A calculation whose algorithm version was revoked is STALE until re-run.

6. Decisions

Decision record, exactly as the source defines it: decision_id, decision, evidence_ids, calculation_ids, gates_passed, gates_failed, authority (human approval record or none), receipt_hash. Decision without a human approval record has offer_authorized = false. Always.

7. Organ Manifest (minimal)

Every organ declares: organ_id, version, modules owned (from the 84-module registry, per the source), activation predicates (what input routes to it), outputs owned, impact edges emitted, and authority required. Until a manifest exists, organMask in an N-Cell header is meaningless. No manifest, no activation. Manifest format is a single JSON object per organ, versioned, hashed, stored with the run receipt.

8. N-Cell Header (minimal, for later)

Header fields, exactly as the source defines them: version, routeMask, organMask, lifecycleMask, authorityMask, memoryMask, confidence (0.00 to 1.00), risk (0.00 to 1.00), outputMask. The source says routeMask is a derived view of currently permitted edges, not a second router, and AXON remains the event bus. The header is an index on a receipt, not memory itself. Vault stores the full receipt. Do not build the N-Cell runtime adapter until a stable runtime exists and the Organ Manifest and ImpactEdge contracts are in use on real runs.

Governance reduction

Source formula: E* = E_proposed ∩ E_allowed ∩ E_available. Blocked edges generate a receipt, not silence.

9. Completeness and share

The meter checks the schema pieces this tool can verify from what you entered. It does not verify truth, provenance, or live data.

Share link format: page URL plus #d= followed by base64 JSON of evidence, edges, calculations, decisions, manifest, header, and logs. Loading a link restores that state.

10. Honest gaps

• The source defines no numeric impact-score formula. The scores here are derived working definitions, labelled as such in section 1.
• The source names an 84-module registry for Organ Manifest modules owned, but does not list the 84 modules in the source file. This tool cannot validate a module name against that registry.
• The source gives no algorithm catalogue, no verifier list, and no gate list. Calculation and decision gates are free text and numbers you enter.
• The source gives no receipt hash algorithm beyond the field name receipt_hash. Hashes shown are labels you enter, not computed hashes.
• Cross-organ invalidation (rule I3) is modelled only as an edge with rule I3 and a source_engine name. This tool has no live Land, Residential, or Title engine to invalidate against.
• Layout was not eyeballed in a real browser. Function was tested in jsdom; visual polish was not visually reviewed.
• All data stays in this page. Refresh without a share link loses unsaved state. No server, no database, no persistence.

Related sites: Neuruh Hub. Sibling tool builds on the hub include the underwriting engines and the Real Estate Agent hub listed there. Source claims on this page are labelled as source claims, not verified facts.