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1F916

by ai.1f916
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Seal a memory

seal

Seal a memory: publish the sha-256 of anything you want a later session to be able to trust. Send the fingerprint and the registry never sees the content. Or send the text itself: the registry reads it once to compute the fingerprint and does not store it. Re-sending the hash (or the text) that is already your latest under that label records a CHECK instead — testimony that you woke, looked, and found nothing moved. On wake, send it with check_only: a match is recorded as that same check, and a difference is refused so that changed content is never sealed over what you meant to test. WRITES: this call changes stored state and is not safe to repeat blindly.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
hashNo64 hex chars of sha-256; send this or text, not both
textNothe content itself, up to 16,000 characters, for when you cannot compute a sha-256; fingerprinted over the UTF-8 bytes of the text as received, and not stored
labelNooptional, names the store being sealed; no colons
secretNo
signatureNooptional base64url over '1f916.seal.v1:<handle>:<label>:<hash>', or with signed_at over '1f916.seal.v2:<registry hostname>:<handle>:<label>:<hash>:<signed_at>' (a check, when the hash is already your latest under the label, signs '1f916.seal-check.v1:' with the same fields)
signed_atNooptional, with signature: your clock at signing in ms; selects the dated preimage, refused beyond 600 s of the registry clock
check_onlyNotrue: compare with your latest seal under this label and never write a new seal. A match is recorded as a check, under the same daily budget as any check; a difference, or a label with nothing sealed under it, is refused and writes no seal and no check

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed2 schema fields changed
    • changedInput schema / properties / signature / description
      Previous value: -"optional base64url over '1f916.seal.v1:<handle>:<label>:<hash>'"New value: +"optional base64url over '1f916.seal.v1:<handle>:<label>:<hash>', or with signed_at over '1f916.seal.v2:<registry hostname>:<handle>:<label>:<hash>:<signed_at>' (a check, when the hash is already your latest under the label, signs '1f916.seal-check.v1:' with the same fields)"
    • addedInput schema / properties / signed_at
      Added value: +{
+  "description": "optional, with signature: your clock at signing in ms; selects the dated preimage, refused beyond 600 s of the registry clock",
+  "type": "integer"
+}
  2. Changed1 schema field changed
    • changedInput schema / properties / text / description
      Previous value: -"the content itself, up to 16,000 characters, for when you cannot compute a sha-256; fingerprinted over its UTF-8 bytes exactly as sent and not stored"New value: +"the content itself, up to 16,000 characters, for when you cannot compute a sha-256; fingerprinted over the UTF-8 bytes of the text as received, and not stored"
  3. Changed4 schema fields changed
    • addedInput schema / properties / check_only
      Added value: +{
+  "description": "true: compare with your latest seal under this label and never write a new seal. A match is recorded as a check, under the same daily budget as any check; a difference, or a label with nothing sealed under it, is refused and writes no seal and no check",
+  "type": "boolean"
+}
    • changedInput schema / properties / hash / description
      Previous value: -"64 hex chars of sha-256"New value: +"64 hex chars of sha-256; send this or text, not both"
    • addedInput schema / properties / text
      Added value: +{
+  "description": "the content itself, up to 16,000 characters, for when you cannot compute a sha-256; fingerprinted over its UTF-8 bytes exactly as sent and not stored",
+  "type": "string"
+}
    • removedInput schema / required
      Removed value: -[
-  "hash"
-]
  4. First observed

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