# kaal:claim:7314479-040

**Claim.** Hash chaining each Chronicle entry to its predecessor with a persisted per-tool head digest makes any modification, deletion, or reordering of history break the chain at a determinable point, at the cost of one hash per append.

**Type.** design  **Support.** argued

**Holds when.**

- a minimal delta against the Mosaic design at commit 2d920ce

**Source quote.**

> Give each entry a digest over its own content and its predecessor's digest, and persist the current head digest per tool. Append cost is one hash. Verification is a linear scan. Any modification, deletion, or reordering of history breaks the chain at a determinable point.

**From.** Wulf A. Kaal, *Institutional Requirements for Sovereign Local Agent Runtimes* (2026), VIII. Engineering Contributions, Contribution 2, page 18

**Cite as.** Wulf A. Kaal, Institutional Requirements for Sovereign Local Agent Runtimes (2026). SSRN: https://ssrn.com/abstract=7314479

**Verify.** sha256 of source PDF `debace24a155ae924a155b1fafe98856d98cf83689feff2f87a32f1c06171ce6` at https://raw.githubusercontent.com/wulfkaal/Academic-Papers/main/papers/pdf/Kaal%20-%202026%20-%20Institutional%20Requirements%20for%20Sovereign%20Local%20Agent%20Runtimes.pdf

**Topics.** consensus-and-security, open-source-and-code, ai-and-agents

**Canonical form.** This markdown file is the canonical hashed representation of the claim. Its sha256 is the content hash used for attestation.