arifOS — Constitutional AI Kernel

999 Seal · VAULT999

arif_seal

Destructive

Append verified outcome or lesson to the immutable audit ledger. Requires ack_irreversible=true to confirm permanent commit. Outputs: immutable ledger entry receipt.

Input Schema

Name	Required	Description	Default
`mode`	No	'seal' (default) — append a permanent entry; 'verify' — check one entry; 'ledger' — read the ledger head; 'changelog' — recent appends; 'audit' — integrity check; 'session_close' — close out a session into the ledger.	seal
`nonce`	No	One-time random string (e.g. a UUID) making this request unique; protects against replay of the same call.
`payload`	No	The content to store forever, as a string (usually JSON-serialized) — the outcome, lesson, or record itself. Required for the write modes (seal, session_close); pure reads (verify, ledger, changelog, audit) may omit it.
`actor_id`	No	Your agent identity, e.g. 'kimi-code/FI-008' or 'claude/sonnet'. Recorded in the audit log so this action is attributed to you.
`session_id`	No	Session id returned by arif_init (looks like 'sess-…'). Pass it on every call after init so the action is attributed to your governed session.
`drift_events`	No	JSON list of deviations observed, e.g. [{"what": "schema drift", "where": "tools/list"}] — stored with the record.
`seal_purpose`	No	One sentence saying why this verdict/record must exist, e.g. 'closing deployment D-17'. Stored permanently alongside the record.
`witness_type`	No	Who witnessed the sealed fact: 'ai', 'human', or 'external' system.	ai
`session_token`	No	Session Continuity Token (SCT) — the credential string arif_init returned alongside session_id. Pass it back on follow-up calls to prove the session is yours; without it the kernel treats you as unauthenticated.
`constitutional`	No	JSON block of governance metadata (floors consulted, chain references) — normally built by the kernel, not by callers.
`actor_signature`	No	Cryptographic signature over the request, if your agent holds a key — proves the call genuinely came from actor_id. Omit if you have no key.
`ack_irreversible`	No	Set true to confirm you understand sealed entries are PERMANENT — they can never be edited or removed.
`judge_state_hash`	No	Hash string from the arif_judge SEAL response — ties this entry to the verdict that authorized it.
`constitutional_chain_id`	No	Id of the evidence chain this call belongs to (observe→think→judge→seal). Copy it from the earlier step's response to link the steps together.

Output Schema

Name	Required	Description	Default
`meta`	Yes
`tool`	Yes
`result`	Yes
`status`	Yes
`delta_S`	No
`reasons`	Yes
`actor_id`	No
`timestamp`	Yes
`session_id`	No
`nine_signal`	Yes
`output_policy`	No
`stage_progression`	No
`philosophical_anchor`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedOct 26, 2026

changedInput schema / allOf

Previous value: -[
-  {
-    "if": {
-      "anyOf": [
-        {
-          "not": {
-            "required": [
-              "mode"
-            ]
-          }
-        },
-        {
-          "properties": {
-            "mode": {
-              "enum": [
-                "seal"
-              ]
-            }
-          },
-          "required": [
-            "mode"
-          ]
-        }
-      ]
-    },
-    "then": {
-      "required": [
-        "seal_purpose"
-      ]
-    }
-  }
-]New value: +[
+  {
+    "if": {
+      "anyOf": [
+        {
+          "not": {
+            "required": [
+              "mode"
+            ]
+          }
+        },
+        {
+          "properties": {
+            "mode": {
+              "enum": [
+                "seal",
+                "session_close"
+              ]
+            }
+          },
+          "required": [
+            "mode"
+          ]
+        }
+      ]
+    },
+    "then": {
+      "required": [
+        "payload",
+        "seal_purpose"
+      ]
+    }
+  }
+]

removedInput schema / required
```
Removed value: -[
-  "payload"
-]
```

Changed1 schema field changedOct 18, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": true,
+  "properties": {
+    "actor_id": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "delta_S": {
+      "anyOf": [
+        {
+          "type": "number"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "meta": {
+      "additionalProperties": true,
+      "type": "object"
+    },
+    "nine_signal": {
+      "additionalProperties": true,
+      "properties": {
+        "delta": {
+          "properties": {
+            "en": {
+              "type": "string"
+            },
+            "plane": {
+              "type": "string"
+            },
+            "state": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "state",
+            "en"
+          ],
+          "type": "object"
+        },
+        "omega": {
+          "properties": {
+            "en": {
+              "type": "string"
+            },
+            "plane": {
+              "type": "string"
+            },
+            "state": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "state",
+            "en"
+          ],
+          "type": "object"
+        },
+        "overall": {
+          "properties": {
+            "en": {
+              "type": "string"
+            },
+            "state": {
+              "type": "string"
+            }
+          },
+          "type": "object"
+        },
+        "psi": {
+          "properties": {
+            "en": {
+              "type": "string"
+            },
+            "plane": {
+              "type": "string"
+            },
+            "state": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "state",
+            "en"
+          ],
+          "type": "object"
+        }
+      },
+      "type": "object"
+    },
+    "output_policy": {
+      "type": "string"
+    },
+    "philosophical_anchor": {
+      "additionalProperties": true,
+      "type": "object"
+    },
+    "reasons": {
+      "items": {
+        "type": "string"
+      },
+      "type": "array"
+    },
+    "result": {
+      "additionalProperties": true,
+      "properties": {
+        "merkle_root": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "mode": {
+          "type": "string"
+        },
+        "nine_signal": {
+          "additionalProperties": true,
+          "type": "object"
+        },
+        "reasons": {
+          "items": {
+            "type": "string"
+          },
+          "type": "array"
+        },
+        "timestamp": {
+          "type": "string"
+        },
+        "vault_entry_id": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "verdict": {
+          "type": "string"
+        }
+      },
+      "type": "object"
+    },
+    "session_id": {
+      "anyOf": [
+        {
+          "type": "string"
+        },
+        {
+          "type": "null"
+        }
+      ]
+    },
+    "stage_progression": {
+      "anyOf": [
+        {
+          "type": "null"
+        },
+        {
+          "properties": {
+            "current_stage": {
+              "type": "string"
+            },
+            "next_prompt": {
+              "anyOf": [
+                {
+                  "type": "string"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "next_stage": {
+              "anyOf": [
+                {
+                  "type": "string"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            },
+            "next_tool": {
+              "anyOf": [
+                {
+                  "type": "string"
+                },
+                {
+                  "type": "null"
+                }
+              ]
+            }
+          },
+          "type": "object"
+        }
+      ]
+    },
+    "status": {
+      "type": "string"
+    },
+    "timestamp": {
+      "type": "string"
+    },
+    "tool": {
+      "const": "arif_seal"
+    }
+  },
+  "required": [
+    "status",
+    "tool",
+    "result",
+    "meta",
+    "timestamp",
+    "nine_signal",
+    "reasons"
+  ],
+  "type": "object"
+}

Changed3 schema fields changedOct 14, 2026

addedInput schema / allOf

Added value: +[
+  {
+    "if": {
+      "anyOf": [
+        {
+          "not": {
+            "required": [
+              "mode"
+            ]
+          }
+        },
+        {
+          "properties": {
+            "mode": {
+              "enum": [
+                "seal"
+              ]
+            }
+          },
+          "required": [
+            "mode"
+          ]
+        }
+      ]
+    },
+    "then": {
+      "required": [
+        "seal_purpose"
+      ]
+    }
+  }
+]

changedInput schema / properties / payload / description

Previous value: -"The content to store forever, as a string (usually JSON-serialized) — the outcome, lesson, or record itself."New value: +"The content to store forever, as a string (usually JSON-serialized) — the outcome, lesson, or record itself. Required for the write modes (seal, session_close); pure reads (verify, ledger, changelog, audit) may omit it."

addedInput schema / required
```
Added value: +[
+  "payload"
+]
```

Changed1 schema field changedOct 14, 2026

removedInput schema / properties / _envelope

Removed value: -{
-  "default": null,
-  "description": "Reserved for the transport layer — never fill this in.",
-  "title": "Envelope"
-}

Changed15 schema fields changedOct 1, 2026

addedInput schema / properties / _envelope / description

Added value: +"Reserved for the transport layer — never fill this in."

addedInput schema / properties / ack_irreversible / description

Added value: +"Set true to confirm you understand sealed entries are PERMANENT — they can never be edited or removed."

addedInput schema / properties / actor_id / description

Added value: +"Your agent identity, e.g. 'kimi-code/FI-008' or 'claude/sonnet'. Recorded in the audit log so this action is attributed to you."

addedInput schema / properties / actor_signature / description

Added value: +"Cryptographic signature over the request, if your agent holds a key — proves the call genuinely came from actor_id. Omit if you have no key."

addedInput schema / properties / constitutional / description

Added value: +"JSON block of governance metadata (floors consulted, chain references) — normally built by the kernel, not by callers."

addedInput schema / properties / constitutional_chain_id / description

Added value: +"Id of the evidence chain this call belongs to (observe→think→judge→seal). Copy it from the earlier step's response to link the steps together."

addedInput schema / properties / drift_events / description

Added value: +"JSON list of deviations observed, e.g. [{\"what\": \"schema drift\", \"where\": \"tools/list\"}] — stored with the record."

addedInput schema / properties / judge_state_hash / description

Added value: +"Hash string from the arif_judge SEAL response — ties this entry to the verdict that authorized it."

addedInput schema / properties / mode / description

Added value: +"'seal' (default) — append a permanent entry; 'verify' — check one entry; 'ledger' — read the ledger head; 'changelog' — recent appends; 'audit' — integrity check; 'session_close' — close out a session into the ledger."

addedInput schema / properties / nonce / description

Added value: +"One-time random string (e.g. a UUID) making this request unique; protects against replay of the same call."

addedInput schema / properties / payload / description

Added value: +"The content to store forever, as a string (usually JSON-serialized) — the outcome, lesson, or record itself."

addedInput schema / properties / seal_purpose / description

Added value: +"One sentence saying why this verdict/record must exist, e.g. 'closing deployment D-17'. Stored permanently alongside the record."

addedInput schema / properties / session_id / description

Added value: +"Session id returned by arif_init (looks like 'sess-…'). Pass it on every call after init so the action is attributed to your governed session."

addedInput schema / properties / session_token / description

Added value: +"Session Continuity Token (SCT) — the credential string arif_init returned alongside session_id. Pass it back on follow-up calls to prove the session is yours; without it the kernel treats you as unauthenticated."

addedInput schema / properties / witness_type / description

Added value: +"Who witnessed the sealed fact: 'ai', 'human', or 'external' system."

Changed15 schema fields changedOct 1, 2026

removedInput schema / properties / _envelope / description

Removed value: -"Reserved for the transport layer — never fill this in."

removedInput schema / properties / ack_irreversible / description

Removed value: -"Set true to confirm you understand sealed entries are PERMANENT — they can never be edited or removed."

removedInput schema / properties / actor_id / description

Removed value: -"Your agent identity, e.g. 'kimi-code/FI-008' or 'claude/sonnet'. Recorded in the audit log so this action is attributed to you."

removedInput schema / properties / actor_signature / description

Removed value: -"Cryptographic signature over the request, if your agent holds a key — proves the call genuinely came from actor_id. Omit if you have no key."

removedInput schema / properties / constitutional / description

Removed value: -"JSON block of governance metadata (floors consulted, chain references) — normally built by the kernel, not by callers."

removedInput schema / properties / constitutional_chain_id / description

Removed value: -"Id of the evidence chain this call belongs to (observe→think→judge→seal). Copy it from the earlier step's response to link the steps together."

removedInput schema / properties / drift_events / description

Removed value: -"JSON list of deviations observed, e.g. [{\"what\": \"schema drift\", \"where\": \"tools/list\"}] — stored with the record."

removedInput schema / properties / judge_state_hash / description

Removed value: -"Hash string from the arif_judge SEAL response — ties this entry to the verdict that authorized it."

removedInput schema / properties / mode / description

Removed value: -"'seal' (default) — append a permanent entry; 'verify' — check one entry; 'ledger' — read the ledger head; 'changelog' — recent appends; 'audit' — integrity check; 'session_close' — close out a session into the ledger."

removedInput schema / properties / nonce / description

Removed value: -"One-time random string (e.g. a UUID) making this request unique; protects against replay of the same call."

removedInput schema / properties / payload / description

Removed value: -"The content to store forever, as a string (usually JSON-serialized) — the outcome, lesson, or record itself."

removedInput schema / properties / seal_purpose / description

Removed value: -"One sentence saying why this verdict/record must exist, e.g. 'closing deployment D-17'. Stored permanently alongside the record."

removedInput schema / properties / session_id / description

Removed value: -"Session id returned by arif_init (looks like 'sess-…'). Pass it on every call after init so the action is attributed to your governed session."

removedInput schema / properties / session_token / description

Removed value: -"Session Continuity Token (SCT) — the credential string arif_init returned alongside session_id. Pass it back on follow-up calls to prove the session is yours; without it the kernel treats you as unauthenticated."

removedInput schema / properties / witness_type / description

Removed value: -"Who witnessed the sealed fact: 'ai', 'human', or 'external' system."

Changed15 schema fields changedSep 25, 2026

addedInput schema / properties / _envelope / description

Added value: +"Reserved for the transport layer — never fill this in."

addedInput schema / properties / ack_irreversible / description

Added value: +"Set true to confirm you understand sealed entries are PERMANENT — they can never be edited or removed."

addedInput schema / properties / actor_id / description

Added value: +"Your agent identity, e.g. 'kimi-code/FI-008' or 'claude/sonnet'. Recorded in the audit log so this action is attributed to you."

addedInput schema / properties / actor_signature / description

Added value: +"Cryptographic signature over the request, if your agent holds a key — proves the call genuinely came from actor_id. Omit if you have no key."

addedInput schema / properties / constitutional / description

Added value: +"JSON block of governance metadata (floors consulted, chain references) — normally built by the kernel, not by callers."

addedInput schema / properties / constitutional_chain_id / description

Added value: +"Id of the evidence chain this call belongs to (observe→think→judge→seal). Copy it from the earlier step's response to link the steps together."

addedInput schema / properties / drift_events / description

Added value: +"JSON list of deviations observed, e.g. [{\"what\": \"schema drift\", \"where\": \"tools/list\"}] — stored with the record."

addedInput schema / properties / judge_state_hash / description

Added value: +"Hash string from the arif_judge SEAL response — ties this entry to the verdict that authorized it."

addedInput schema / properties / mode / description

Added value: +"'seal' (default) — append a permanent entry; 'verify' — check one entry; 'ledger' — read the ledger head; 'changelog' — recent appends; 'audit' — integrity check; 'session_close' — close out a session into the ledger."

addedInput schema / properties / nonce / description

Added value: +"One-time random string (e.g. a UUID) making this request unique; protects against replay of the same call."

addedInput schema / properties / payload / description

Added value: +"The content to store forever, as a string (usually JSON-serialized) — the outcome, lesson, or record itself."

addedInput schema / properties / seal_purpose / description

Added value: +"One sentence saying why this verdict/record must exist, e.g. 'closing deployment D-17'. Stored permanently alongside the record."

addedInput schema / properties / session_id / description

Added value: +"Session id returned by arif_init (looks like 'sess-…'). Pass it on every call after init so the action is attributed to your governed session."

addedInput schema / properties / session_token / description

Added value: +"Session Continuity Token (SCT) — the credential string arif_init returned alongside session_id. Pass it back on follow-up calls to prove the session is yours; without it the kernel treats you as unauthenticated."

addedInput schema / properties / witness_type / description

Added value: +"Who witnessed the sealed fact: 'ai', 'human', or 'external' system."

Changed1 schema field changedAug 3, 2026
- addedInput schema / properties / ack_irreversible
```
Added value: +{
+  "default": false,
+  "type": "boolean"
+}
```
Changed1 schema field changedAug 3, 2026
- removedInput schema / properties / ack_irreversible
```
Removed value: -{
-  "default": false,
-  "type": "boolean"
-}
```

Changed2 schema fields changedJul 30, 2026

addedInput schema / properties / ack_irreversible

Added value: +{
+  "default": false,
+  "type": "boolean"
+}

changedInput schema / properties / mode / enum

Previous value: -[
-  "ed25519_verify"
-]New value: +[
+  "seal",
+  "verify",
+  "ledger",
+  "changelog",
+  "audit",
+  "session_close"
+]

Changed1 schema field changedJul 24, 2026

addedInput schema / properties / seal_purpose

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null
+}

Changed1 schema field changedJul 18, 2026

changedInput schema / properties / mode / enum

Previous value: -[
-  "seal",
-  "verify",
-  "ledger",
-  "changelog",
-  "audit"
-]New value: +[
+  "ed25519_verify"
+]

Changed1 schema field changedJul 11, 2026

addedInput schema / properties / constitutional

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": true,
+      "type": "object"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null
+}

Changed1 schema field changedJul 9, 2026

addedInput schema / properties / session_token

Added value: +{
+  "anyOf": [
+    {
+      "type": "string"
+    },
+    {
+      "type": "null"
+    }
+  ],
+  "default": null
+}

Changed1 schema field changedJul 8, 2026
- removedInput schema / properties / ack_irreversible
```
Removed value: -{
-  "default": false,
-  "type": "boolean"
-}
```

Changed1 schema field changedJul 4, 2026

changedOutput schema / (root)

Previous value: -{
-  "additionalProperties": true,
-  "type": "object"
-}New value: +null

AddedJul 4, 2026
RemovedJul 3, 2026

Changed3 schema fields changedJul 3, 2026

addedOutput schema / additionalProperties
```
Added value: +true
```

removedOutput schema / properties

Removed value: -{
-  "_nine_signal_compliant": {
-    "description": "Internal compliance flag",
-    "type": "boolean"
-  },
-  "_violations": {
-    "description": "Non-compliance audit trail",
-    "items": {
-      "type": "string"
-    },
-    "type": "array"
-  },
-  "actor_id": {
-    "description": "Sovereign or agent actor ID",
-    "type": [
-      "string",
-      "null"
-    ]
-  },
-  "delta_S": {
-    "description": "Thermodynamic entropy change",
-    "type": "number"
-  },
-  "meta": {
-    "description": "Metadata including actor_id, mode, circuit",
-    "type": "object"
-  },
-  "nine_signal": {
-    "description": "F2 addendum nine-signal block",
-    "type": "object"
-  },
-  "output_policy": {
-    "description": "Policy constraints: DOMAIN_SEAL, DOMAIN_HOLD, DOMAIN_VOID, SIMULATION_ONLY",
-    "type": "string"
-  },
-  "reasons": {
-    "description": "Human-readable justification list",
-    "items": {
-      "type": "string"
-    },
-    "type": "array"
-  },
-  "result": {
-    "description": "Tool-specific payload",
-    "type": "object"
-  },
-  "session_id": {
-    "description": "Active session identifier",
-    "type": [
-      "string",
-      "null"
-    ]
-  },
-  "stage_progression": {
-    "description": "Next stage auto-chain hint",
-    "type": [
-      "object",
-      "null"
-    ]
-  },
-  "status": {
-    "description": "Execution status: OK, ERROR, TIMEOUT, DRY_RUN",
-    "type": "string"
-  },
-  "timestamp": {
-    "description": "ISO-8601 timestamp",
-    "type": "string"
-  },
-  "tool": {
-    "description": "Canonical tool name that produced this response",
-    "type": "string"
-  },
-  "verdict": {
-    "description": "Constitutional verdict: SEAL, HOLD, VOID, SABAR, PROVISIONAL, PARTIAL",
-    "type": "string"
-  }
-}

removedOutput schema / required

Removed value: -[
-  "status",
-  "tool",
-  "verdict",
-  "result",
-  "nine_signal",
-  "reasons"
-]

First observedJun 30, 2026

TDQS

B3.4/5.0

Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare destructiveHint=true and non-idempotent, and the description reinforces this with the immutability framing and the mandatory ack flag, plus it names the receipt output. It stops short of noting that the read modes on this same tool are non-destructive, so the safety picture is only partly drawn.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three short sentences, front-loaded with the action and immediately followed by the hard prerequisite. Nothing is padded, though the brevity comes at the cost of omitting the mode-selection surface entirely.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The output schema and 100%-documented param schema cover return values and per-parameter meaning, so little is owed there. But for a 14-parameter, six-mode tool the description describes only the seal path, leaving the read/verify/audit behaviors and the judge-to-seal chaining (judge_state_hash, constitutional_chain_id) undisclosed at the description level.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and each of the 14 parameters already carries a detailed description, so the schema does the heavy lifting. The description adds only the ack_irreversible requirement, which the schema itself also explains — baseline 3.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource: 'Append verified outcome or lesson to the immutable audit ledger' — clear what gets written and where it goes. It does not differentiate this tool from siblings such as arif_judge or arif_report, which also produce verdict/evidence artifacts, so the agent cannot easily tell which to pick.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The only usage instruction is the ack_irreversible=true prerequisite for the permanent-commit path. Nothing says when to seal versus judge, report, or remember, and the description never mentions the mode enum ('verify', 'ledger', 'changelog', 'audit', 'session_close'), so an agent would reasonably assume this is write-only and miss five of its six behaviors.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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