diff --git a/tools/observer-chain-detector.mjs b/tools/observer-chain-detector.mjs
deleted file mode 100644
index 606c1de..0000000
--- a/tools/observer-chain-detector.mjs
+++ /dev/null
@@ -1,24 +0,0 @@
-import { readFileSync } from 'node:fs';
-import { fileURLToPath } from 'node:url';
-import { dirname, join } from 'node:path';
-
-const __dirname = dirname(fileURLToPath(import.meta.url));
-const DEFAULT_MAP_PATH = join(__dirname, 'observer-chain-map.json');
-
-/** Load the node->chains map. Throws on missing/invalid JSON (caller handles). */
-export function loadChainMap(path = DEFAULT_MAP_PATH) {
-  const raw = JSON.parse(readFileSync(path, 'utf8'));
-  const map = new Map();
-  for (const [node, chains] of Object.entries(raw)) {
-    if (node === '_note') continue;
-    if (Array.isArray(chains) && chains.length > 0) map.set(node, chains);
-  }
-  return map;
-}
-
-/** node_chosen -> array of L-chains, or null if not in any chain. */
-export function chainsFor(node, map) {
-  if (!node || typeof node !== 'string') return null;
-  const chains = map.get(node);
-  return chains && chains.length > 0 ? chains : null;
-}
diff --git a/tools/observer-chain-detector.test.mjs b/tools/observer-chain-detector.test.mjs
deleted file mode 100644
index 8ad6708..0000000
--- a/tools/observer-chain-detector.test.mjs
+++ /dev/null
@@ -1,32 +0,0 @@
-import { describe, it, expect } from 'vitest';
-import { loadChainMap, chainsFor } from './observer-chain-detector.mjs';
-
-const map = loadChainMap();
-
-describe('chainsFor', () => {
-  it('returns chain array for a single-chain node', () => {
-    expect(chainsFor('billing-audit', map)).toEqual(['L13']);
-  });
-
-  it('returns all chains for a multi-chain node', () => {
-    expect(chainsFor('discovery-interview', map)).toEqual(['L1', 'L2']);
-  });
-
-  it('returns null for direct', () => {
-    expect(chainsFor('direct', map)).toBeNull();
-  });
-
-  it('returns null for an unknown node', () => {
-    expect(chainsFor('totally-unknown-xyz', map)).toBeNull();
-  });
-
-  it('returns null for empty/null/undefined', () => {
-    expect(chainsFor('', map)).toBeNull();
-    expect(chainsFor(null, map)).toBeNull();
-    expect(chainsFor(undefined, map)).toBeNull();
-  });
-
-  it('ignores the _note metadata key', () => {
-    expect(chainsFor('_note', map)).toBeNull();
-  });
-});
diff --git a/tools/observer-chain-map.json b/tools/observer-chain-map.json
deleted file mode 100644
index 8fcfeb6..0000000
--- a/tools/observer-chain-map.json
+++ /dev/null
@@ -1,59 +0,0 @@
-{
-  "_note": "node_chosen -> L-цепочки. Только узлы, входящие хотя бы в одну L1-L13. Узлы вне цепочек (direct, прочее) НЕ включаются -> chainsFor вернёт null. Имена ключей = реальные значения primary_rationale.node_chosen (skill-id из skill_invoked). MCP/agent-узлы (laravel-boost, openapi-mcp-server, api-docs, sentry-mcp, redis-mcp, pest, github-mcp) в node_chosen не появляются, но включены для полноты покрытия цепочек L1-L13 (контролёр C6 требует, чтобы каждая L из routing-off-phase.md была покрыта). Синхронизируется с docs/routing-off-phase.md через tools/observer-chain-map-checker.mjs.",
-  "discovery-interview": ["L1", "L2"],
-  "superpowers:brainstorming": ["L1", "L16", "L17"],
-  "superpowers:writing-plans": ["L1"],
-  "superpowers:subagent-driven-development": ["L1"],
-  "audit-portal": ["L2"],
-  "process-analysis": ["L3"],
-  "process-modeling": ["L3", "L4"],
-  "mermaid": ["L4"],
-  "adr-kit:adr": ["L4", "L5"],
-  "adr-kit:judge": ["L5"],
-  "operations": ["L4"],
-  "architecture-patterns:architecture-patterns": ["L5"],
-  "deptrac": ["L5", "L14"],
-  "rector": ["L14"],
-  "php-insights": ["L14"],
-  "larastan": ["L14"],
-  "laravel-backend-patterns": ["L14"],
-  "security-review": ["L6"],
-  "openapi-mcp-server": ["L7"],
-  "api-docs": ["L7"],
-  "laravel-boost": ["L7", "L13"],
-  "superpowers:systematic-debugging": ["L8"],
-  "sentry-mcp": ["L8", "L13"],
-  "redis-mcp": ["L8", "L13"],
-  "ccpm": ["L9"],
-  "product-management:brainstorm": ["L9"],
-  "github-mcp": ["L9"],
-  "promptfoo": ["L10"],
-  "data-scientist": ["L10"],
-  "claude-api": ["L10"],
-  "skill-creator:skill-creator": ["L11"],
-  "hookify:hookify": ["L11"],
-  "plugin-dev:create-plugin": ["L11"],
-  "claude-md-management:claude-md-improver": ["L12"],
-  "claude-md-management:revise-claude-md": ["L12"],
-  "billing-audit": ["L13"],
-  "pest": ["L13"],
-  "ru-tax-accounting": ["L13"],
-  "security-go-live": ["L15"],
-  "pdn-152fz-audit": ["L15"],
-  "threat-model": ["L15"],
-  "nuclei": ["L15"],
-  "ward": ["L15"],
-  "owasp-zap": ["L15"],
-  "gitleaks": ["L15"],
-  "semgrep": ["L15"],
-  "trailofbits": ["L15"],
-  "marketing": ["L16"],
-  "marketing-ru": ["L16"],
-  "yandex-metrika-mcp": ["L16"],
-  "yandex-wordstat-mcp": ["L16"],
-  "telegram-mcp": ["L16"],
-  "postiz": ["L16"],
-  "perplexity-mcp": ["L17"],
-  "exa-mcp": ["L17"],
-  "firecrawl-mcp": ["L17"]
-}
diff --git a/tools/observer-retrofill-chain-ref.mjs b/tools/observer-retrofill-chain-ref.mjs
deleted file mode 100644
index 3d6df8d..0000000
--- a/tools/observer-retrofill-chain-ref.mjs
+++ /dev/null
@@ -1,58 +0,0 @@
-#!/usr/bin/env node
-/**
- * One-shot retrofill: add primary_rationale.chain_ref to existing v2 episodes
- * in docs/observer/episodes-*.jsonl. Idempotent (skips lines that already have
- * chain_ref), atomic per file (tmp + rename). Pure fs, no LLM.
- *
- * Usage: node tools/observer-retrofill-chain-ref.mjs [--dry-run]
- */
-import { readFileSync, writeFileSync, renameSync, readdirSync } from 'node:fs';
-import { fileURLToPath } from 'node:url';
-import { dirname, join } from 'node:path';
-import { loadChainMap, chainsFor } from './observer-chain-detector.mjs';
-
-const __dirname = dirname(fileURLToPath(import.meta.url));
-const OBS_DIR = join(__dirname, '..', 'docs', 'observer');
-
-/** Add chain_ref to a single parsed episode object (pure). Idempotent. */
-export function retrofillLine(ep, map) {
-  if (!ep || ep.schema_version !== 2 || !ep.primary_rationale) return ep;
-  if ('chain_ref' in ep.primary_rationale) return ep; // idempotent
-  ep.primary_rationale.chain_ref = chainsFor(ep.primary_rationale.node_chosen, map);
-  return ep;
-}
-
-/** Process one JSONL file atomically (tmp + rename). Returns {changed, total}. */
-export function retrofillFile(path, map, { dryRun = false } = {}) {
-  const lines = readFileSync(path, 'utf8').split(/\r?\n/);
-  let changed = 0;
-  let total = 0;
-  const out = lines.map((line) => {
-    if (!line.trim()) return line;
-    total++;
-    const ep = JSON.parse(line);
-    const before = ep.primary_rationale && 'chain_ref' in ep.primary_rationale;
-    const next = retrofillLine(ep, map);
-    const after = next.primary_rationale && 'chain_ref' in next.primary_rationale;
-    if (!before && after) changed++;
-    return JSON.stringify(next);
-  });
-  if (!dryRun && changed > 0) {
-    const tmp = `${path}.tmp`;
-    writeFileSync(tmp, out.join('\n'), 'utf8');
-    renameSync(tmp, path);
-  }
-  return { changed, total };
-}
-
-function main() {
-  const dryRun = process.argv.includes('--dry-run');
-  const map = loadChainMap();
-  const files = readdirSync(OBS_DIR).filter((f) => /^episodes-\d{4}-\d{2}\.jsonl$/.test(f));
-  for (const f of files) {
-    const { changed, total } = retrofillFile(join(OBS_DIR, f), map, { dryRun });
-    console.log(`${dryRun ? '[dry-run] ' : ''}${f}: ${changed}/${total} lines get chain_ref`);
-  }
-}
-
-if (process.argv[1]?.endsWith('observer-retrofill-chain-ref.mjs')) main();
diff --git a/tools/observer-retrofill-chain-ref.test.mjs b/tools/observer-retrofill-chain-ref.test.mjs
deleted file mode 100644
index 9ba7410..0000000
--- a/tools/observer-retrofill-chain-ref.test.mjs
+++ /dev/null
@@ -1,28 +0,0 @@
-import { describe, it, expect } from 'vitest';
-import { retrofillLine } from './observer-retrofill-chain-ref.mjs';
-import { loadChainMap } from './observer-chain-detector.mjs';
-
-const map = loadChainMap();
-
-describe('retrofillLine', () => {
-  it('adds chain_ref to a v2 episode with a known node', () => {
-    const ep = { schema_version: 2, primary_rationale: { node_chosen: 'billing-audit' } };
-    const out = retrofillLine(ep, map);
-    expect(out.primary_rationale.chain_ref).toEqual(['L13']);
-  });
-
-  it('sets chain_ref null for a direct v2 episode', () => {
-    const ep = { schema_version: 2, primary_rationale: { node_chosen: 'direct' } };
-    expect(retrofillLine(ep, map).primary_rationale.chain_ref).toBeNull();
-  });
-
-  it('is idempotent — does not overwrite existing chain_ref', () => {
-    const ep = { schema_version: 2, primary_rationale: { node_chosen: 'direct', chain_ref: ['L1'] } };
-    expect(retrofillLine(ep, map).primary_rationale.chain_ref).toEqual(['L1']);
-  });
-
-  it('skips v1 episodes (no schema_version 2)', () => {
-    const ep = { foo: 'bar' };
-    expect(retrofillLine(ep, map)).toEqual({ foo: 'bar' });
-  });
-});
diff --git a/tools/observer-transcript-parser.mjs b/tools/observer-transcript-parser.mjs
index a64cf16..3baed96 100644
--- a/tools/observer-transcript-parser.mjs
+++ b/tools/observer-transcript-parser.mjs
@@ -22,7 +22,6 @@ import { readRouterState, extractRouterFields, extractClassifierOutput } from '.
 import { CLASSIFIER_MODEL } from './router-config.mjs';
 import { homedir } from 'node:os';
 import { detectChoiceProvenance, detectAskUserQuestionChoice } from './observer-choice-detector.mjs';
-import { loadChainMap, chainsFor } from './observer-chain-detector.mjs';
 import { buildHookMap, resolveScriptCounts } from './observer-hook-resolver.mjs';
 // recommendNode / buildClassificationMap / buildDormancyMap были использованы
 // для слепого fallback на heuristic recommended_node — убрано 2026-05-26
@@ -33,13 +32,6 @@ import { JUDGE_PER_CALL_USD } from './cost-pricing.mjs';
 
 const __dirname = dirname(fileURLToPath(import.meta.url));
 
-let CHAIN_MAP = null;
-try {
-  CHAIN_MAP = loadChainMap();
-} catch {
-  CHAIN_MAP = new Map(); // битый/отсутствующий JSON -> chainsFor вернёт null, observer не падает
-}
-
 let HOOK_MAP = null;
 function getHookMap() {
   if (HOOK_MAP) return HOOK_MAP;
@@ -57,7 +49,6 @@ function getHookMap() {
  * the regex on its own would happily slurp into candidates_considered.
  * Sources, in order:
  *   - tools/observer-known-nodes.txt — bare names (brainstorming, ccpm, …)
- *   - tools/observer-chain-map.json keys — incl. plugin:skill form
  *   - sentinel "direct" (no-skill marker used by node_chosen)
  * Tooling IDs (#NN) and arbitrary plugin:skill forms pass via regex below.
  */
@@ -70,9 +61,8 @@ const KNOWN_NODES = (() => {
       if (t) set.add(t);
     }
   } catch {
-    // file missing in some test sandboxes — fall back to chain-map keys only
+    // file missing in some test sandboxes — whitelist falls back to "direct" + regex shapes
   }
-  if (CHAIN_MAP) for (const node of CHAIN_MAP.keys()) set.add(node);
   return set;
 })();
 
@@ -960,7 +950,6 @@ export function parseTranscript(transcriptText, fallbackSessionId = null, option
       return {
         step: 1,
         node_chosen: skills.length > 0 ? skills[0] : 'direct',
-        chain_ref: chainsFor(skills.length > 0 ? skills[0] : 'direct', CHAIN_MAP),
         triggers_matched: merge(extractTriggers(turn), tag ? tag.triggers : []),
         candidates_considered: merge(extractCandidates(turn), tag ? tag.candidates : []),
         boundaries_applied: merge(extractBoundaries(turn), tag ? tag.boundaries : []),
diff --git a/tools/observer-transcript-parser.test.mjs b/tools/observer-transcript-parser.test.mjs
index f6bde1e..c45d540 100644
--- a/tools/observer-transcript-parser.test.mjs
+++ b/tools/observer-transcript-parser.test.mjs
@@ -127,25 +127,6 @@ describe('parseTranscript', () => {
     expect(parseTranscript(t).primary_rationale.node_chosen).toBe('direct');
   });
 
-  it('attaches chain_ref for a node that belongs to a chain', () => {
-    const t = jsonl([
-      userPrompt('go', '2026-05-19T10:00:00Z'),
-      assistantTurn(
-        [{ type: 'tool_use', id: 't1', name: 'Skill', input: { skill: 'billing-audit' } }],
-        '2026-05-19T10:01:00Z'
-      ),
-    ]);
-    expect(parseTranscript(t).primary_rationale.chain_ref).toEqual(['L13']);
-  });
-
-  it('sets chain_ref null for a direct episode', () => {
-    const t = jsonl([
-      userPrompt('go', '2026-05-19T10:00:00Z'),
-      assistantTurn([{ type: 'tool_use', id: 't1', name: 'Read', input: {} }], '2026-05-19T10:01:00Z'),
-    ]);
-    expect(parseTranscript(t).primary_rationale.chain_ref).toBeNull();
-  });
-
   it('hard_floor invoked when a superpowers skill is used', () => {
     const t = jsonl([
       userPrompt('go', '2026-05-19T10:00:00Z'),