S00-003: Record blocked task and remediation handoff

Changes: Preserve incomplete work and blocker metadata for S00-003. This checkpoint does not mark implementation accepted.
Validation: Session ended with status blocked.
Blocker: S00-003 cannot reproduce accepted Node 24.21.0/npm 11.19.0 or install locked Stanza: host tools are 24.1.0/11.3.0, parent node_modules is absent, and normal official HTTPS retrieval fails with unresolved configured proxy.

Task: S00-003
Agent: auto-protocol-59f4d359b339
Role: protocol
Action: claim
Status: blocked

Task title: Проверить XMPP WSS/auth библиотеку

state/blockers/S00-020.md

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+# Blocker S00-020
+
+- Original task: S00-003
+- Root task: S00-003
+- Reporter: auto-protocol-59f4d359b339
+- Role: protocol
+- Original owner: auto-protocol-59f4d359b339
+- Waits for user/external condition: True
+
+## Cause
+
+S00-003 cannot reproduce accepted Node 24.21.0/npm 11.19.0 or install locked Stanza: host tools are 24.1.0/11.3.0, parent node_modules is absent, and normal official HTTPS retrieval fails with unresolved configured proxy.
+
+## One remediation outcome
+
+One independently reviewed environment-access probe demonstrates authentic pinned Linux Node/npm and integrity-verified installation of the parent locked dependency graph without changing accepted stack or network security policy.
+
+## Evidence / reproduction
+
+node --version => v24.1.0; npm --version => 11.3.0; parent node_modules/stanza absent; curl official v24.21.0 SHASUMS256.txt => exit 5 Could not resolve proxy. Details: state/evidence/S00-003-auto-protocol-59f4d359b339.md
+
+The reporting agent must stop now. A new agent implements only S00-020.