Borrowing it
Nothing to install: this file belongs to greenpau/go-authcrunch. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/greenpau/go-authcrunch/main/.codex/skills/local-identity-database/SKILL.mdgit clone --depth 1 https://github.com/greenpau/go-authcrunchWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/greenpau/go-authcrunch/local-identity-database)<a href="https://agentmods.dev/skills/greenpau/go-authcrunch/local-identity-database"><img src="https://agentmods.dev/badge/skills/greenpau/go-authcrunch/local-identity-database/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/greenpau/go-authcrunch/local-identity-database"><img src="https://agentmods.dev/badge/skills/greenpau/go-authcrunch/local-identity-database.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00042 | $0.01332 |
| Opus 5.5 | $0.00017 | $0.00533 |
| Sonnet 5.5 | $0.00008 | $0.00266 |
| Haiku 4.5 | $0.00004 | $0.00133 |
Grade A, and why
local-identity-database scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 17d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Local Identity Database
Read external account attachments when changing automatic external/LDAP provisioning, stable identity keys, connection transactions, portal confirmation, administration without local email aliases, attachment configuration, or embedding integration.
Ownership and transaction boundary
The exact :memory: constructor argument selects private memory storage before
any filesystem lookup. A file, directory or symlink with that literal name in
the working directory must neither seed identities/policy nor prevent startup.
Memory mutations leave such entries untouched; an explicit filesystem path
whose basename is :memory: still selects normal file storage. Keep constructor
boundary tests and the attached-provider TLS isolation journey for this rule.
pkg/identity/database.go, database_atomic_write.go, database_file_lock*.go,
identity_request.go, and refresh.go own persistence and security transactions.
pkg/ids/local holds the authenticator lock across database replacement and
adapts the optional ids.IdentityRequestStore interface. Password hashing belongs
to local-password-authentication; portal login proof belongs to
refresh-token-identity.
File-backed security decisions use a freshly decoded, normalized and indexed snapshot under the canonical sidecar lock. Hold that lock through password/API-key verification and through current-identity issuance callbacks. A locked read followed by unlocked verification/signing permits revocation to race success. Preserve lock order: local authenticator, live database, canonical file lock; callbacks must not reenter that database or another alias of the same file.
Generic commits compare the persisted Revision with the writer's snapshot. On a stale revision, adopt current state, invalidate the old backend epoch and return a conflict; never overwrite a newer password, role, disabled flag or credential version. Callers must re-evaluate against current state before retry. Do not automatically retry a mutation already authorized with stale evidence. Fresh self-service transactions may commit an isolated current snapshot once.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 17d ago Changed · +12 lines · +4 tokens per session cfb3a2315f94
- 1mo ago Changed · +15 lines 0cab820560e3
- 1mo ago Changed · +7 lines 6b863e072f20
- 1mo ago Changed · +17 lines f9f107b73c9b
- 1mo ago First seen · 65 lines · 38 tokens per session scan A d1889e6b4b9c
local-identity-database is a skill published in the GitHub repository greenpau/go-authcrunch (60 stars, last pushed 10d ago), licensed Apache-2.0. It adds 42 tokens to every session and 1,332 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-18.
local-identity-database compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| local-identity-databasegreenpau/go-authcrunch | Skill | 60 | 10d ago | Apache-2.0 | A | 42 | Codex |
| create-prprisma/orm | Skill | 48k | yesterday | Apache-2.0 | A | 48 | Claude Code, Codex |
| schema-explorationlangchain-ai/deepagents | Skill | 31k | yesterday | MIT | A | 57 | Claude Code, Codex |
| atlas-mssqlariga/atlas | Skill | 8.8k | yesterday | Apache-2.0 | A | 163 | Claude Code |
| ha-data-storesshiwenwen/hope-agent | Skill | 1.9k | yesterday | MIT | A | 115 | Claude Code, Codex |
| nornicdb-cypher-queriesorneryd/NornicDB | Skill | 923 | yesterday | MIT | A | 79 | Claude Code, Codex |
| volcengine-rds-postgresqlbytedance/agentkit-samples | Skill | 484 | today | Apache-2.0 | A | 63 | Claude Code, Codex |