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SecretSpec 0.13: SDKs for Python, Node.js, Go, Ruby, and Haskell

Jul 3, 2026

Domen Kožar

SecretSpec separates what secrets an application needs, declared in secretspec.toml, from where the values live, a provider like your system keyring, 1Password, or Vault. Until now, reading those resolved secrets at runtime meant the CLI or the Rust SDK. If your service was written in Python or Go, you shelled out to secretspec run or reimplemented resolution yourself.

SecretSpec 0.13 closes that gap. It ships native SDKs for five languages: Python, Node.js / TypeScript, Go, Ruby, and Haskell. Each resolves the exact secrets your manifest declares, through the same providers, profiles, fallback chains, and generators as the CLI, with no per-language configuration.

Native bindings over one resolver

Every SDK is a thin client over the same Rust core that powers the CLI. No provider logic, profile resolution, chain fallback, as_path materialization, or secret generation lives in the binding. A provider added to SecretSpec works in every language the day it lands, and every SDK behaves identically.

The binding strategy is chosen per ecosystem:

• Python: a pyo3 extension, statically linked, shipped as a self-contained cp39-abi3 wheel.
• Node.js: a napi-rs addon with prebuilt per-platform packages.
• Ruby: a native C extension (mkmf) with the resolver statically linked into a platform gem.
• Go: the secretspec-ffi C ABI loaded at runtime via purego (no cgo).
• Haskell: the same C ABI, linked at build time through the Haskell FFI.

The same three steps, in your language

Each SDK mirrors the vocabulary of the Rust derive crate: a builder that takes a provider, a profile, and an access reason, then load() to resolve, then a map of secrets you can read or export into the environment.

# Python
from secretspec import SecretSpec

resolved = (
    SecretSpec.builder()
    .with_provider("keyring://")
    .with_profile("production")
    .with_reason("boot web app")
    .load()
)
print(resolved.secrets["DATABASE_URL"].get)  # value, or file path for as_path
resolved.set_as_env()                         # export into os.environ

// Node.js / TypeScript
const { SecretSpec } = require('secretspec');

const resolved = SecretSpec.builder()
  .withProvider('keyring://')
  .withProfile('production')
  .withReason('boot web app')
  .load();
console.log(resolved.secrets.DATABASE_URL.get()); // value, or as_path file path
resolved.setAsEnv();                              // export into process.env

// Go
resolved, err := secretspec.New().
    WithProvider("keyring://").
    WithProfile("production").
    WithReason("boot web app").
    Load()
fmt.Println(resolved.Secrets["DATABASE_URL"].Get()) // value, or as_path file path
resolved.SetAsEnv()                                 // export into the environment

# Ruby
resolved = Secretspec::SecretSpec.builder
                                 .with_provider("keyring://")
                                 .with_profile("production")
                                 .with_reason("boot web app")
                                 .load
puts resolved.secrets["DATABASE_URL"].get # value, or as_path file path
resolved.set_as_env!                      # export into ENV

-- Haskell
resolved <-
  S.load
    ( S.builder
        & S.withProvider "keyring://"
        & S.withProfile "production"
        & S.withReason "boot web app"
    )
S.setAsEnv resolved -- export into the environment

Across all of them, load() resolves every declared secret, a missing required secret raises a typed MissingRequiredError, and as_path secrets come back as a readable file path with a cleanup that removes the backing temp file. The access reason feeds the same audit log and require_reason policy from 0.12, so a Go service is as accountable as the CLI.

Write your own binding

Under all five SDKs sits a new crate, secretspec-ffi: a small, versioned C ABI for resolving secrets. If we do not ship your language yet, you can bind to it directly. It also exposes the public Rust building blocks the SDKs share, Secrets::resolve() and Secrets::report(), so a Rust program reaches the same value-carrying and value-free entry points.

Typed secrets, one schema for every language

secretspec.toml already knows the shape of your secrets, so 0.13 can hand that shape to your type system. secretspec schema emits a JSON Schema for your manifest, the union of all profiles or one profile with --profile. Pipe it through quicktype to generate idiomatic typed classes in any language, then populate them from each SDK’s fields() map:

secretspec schema | quicktype -s schema --top-level SecretSpec --lang python -o secrets_gen.py

typed = Secrets.from_dict(resolved.fields())
print(typed.database_url)  # typed str

One schema drives every language’s type system, with no hand-written emitter per language.

Install

pip install secretspec                              # Python
npm install secretspec                              # Node.js / TypeScript
gem install secretspec                              # Ruby
go get github.com/cachix/secretspec/secretspec-go   # Go

For Haskell, add secretspec from Hackage to your build-depends. The CLI and Rust SDK upgrade as usual:

cargo install secretspec

See the SDK overview for the per-language guides. Questions or feedback? Join us on Discord.

SecretSpec 0.12: audit logs and coding agents

Jun 8, 2026

Domen Kožar

A coding agent reaches for the same secrets you do, but on its own initiative and many times a session: a read looks identical whether it came from you running a deploy or an agent exploring the codebase.

SecretSpec 0.12 makes that access accountable. It ships three things:

• Audit log — every secret read and write is appended to a local, per-user JSONL log. On by default. Values are never recorded.
• Reason-on-access — secret access can require a human-readable reason, enforced for coding agents by default.
• secretspec audit command — filter and summarize the log, or pipe raw JSON Lines to jq.

Behavior change in 0.12

If you run SecretSpec inside a coding agent, secret access now fails until a reason is supplied. This is the new default (require_reason = "agents"). Opt out with require_reason = false in the [project] table. Existing providers and library callers keep working unchanged. See Upgrading.

The audit log

Every secret read and write, from the CLI and the Rust SDK, is appended to a local log as JSON Lines, one event per line. Secret values are never written, only metadata: the secret name, the profile, the provider that served it (with any embedded credentials redacted), the outcome, the reason, and who was asking, including the detected coding agent.

{
  "v": 1,
  "ts": "2026-06-04T17:04:00.893Z",
  "action": "get",
  "project": "my-app",
  "profile": "production",
  "key": "DATABASE_URL",
  "provider": "keyring://",
  "outcome": "found",
  "reason": "deploy web frontend",
  "actor": { "user": "alice", "agent": "claude-code", "is_agent": true },
  "version": "0.12.0"
}

The log lives in your per-user state directory (~/.local/state/secretspec/audit.log) and is created readable only by you. Read it with any tool, or use the new secretspec audit command for filtering and a readable summary:

# Last 20 entries, formatted
secretspec audit -n 20

# Only `run` events for one project
secretspec audit --project my-app --action run

# Raw JSON Lines, piped to jq
secretspec audit --json | jq 'select(.outcome == "missing")'

It is configured in your user-global config (~/.config/secretspec/config.toml), not the project’s secretspec.toml, so a repository you clone can’t quietly turn off or redirect your audit log. The log is a single file capped at 1 MiB, a size-bounded recent record rather than permanent compliance history; forward it to a central system if you need that. To turn it off entirely:

~/.config/secretspec/config.toml

[audit]
enabled = false

See Audit Logging for the full record schema and options.

Supplying a reason

When a coding agent like Claude Code reaches for a secret without a reason, the access is refused and the agent is told exactly what to do next:

$ secretspec run -- npm test
Error: Accessing secrets requires a reason. Provide one with --reason
"<why you are accessing these secrets>", the SECRETSPEC_REASON environment
variable, or Secrets::with_reason() in the SDK. (Policy: require_reason in
[project] of secretspec.toml — defaults to "agents"; set it to false to
disable.)

Claude Code reads that message, states why it needs the secret, and retries:

secretspec run --reason "run the test suite before opening a PR" -- npm test

Both the refusal and the successful retry land in the audit log, so the reason is tied to the access. There are three ways to supply a reason:

Source	Scope	Precedence
--reason flag	CLI	highest
Secrets::with_reason()	SDK	overrides env
SECRETSPEC_REASON	CLI + SDK + derive	lowest

# CLI: the most explicit option, overrides the others
secretspec run --reason "deploying release 0.12" -- ./deploy.sh

// SDK: the programmatic equivalent of --reason
let secrets = Secrets::load(/* ... */)?.with_reason("nightly backup job");

# Env: lowest precedence, but honored everywhere
export SECRETSPEC_REASON="nightly backup job"

SECRETSPEC_REASON is resolved by Secrets::load / load_from, which means secretspec-derive-generated code and other library callers satisfy the policy and supply an audit reason without any code changes.

Whichever path you use, blank or whitespace-only reasons are ignored, so they can’t quietly satisfy the policy. Under the hood this is backed by a new Provider::set_reason trait method (a no-op by default), so existing providers keep working unchanged.

Configuring when a reason is required

The new require_reason policy in the [project] table controls when a reason is mandatory:

[project]
name = "my-app"
require_reason = "agents"  # require it from agents (default), or true / false

• "agents" (the default): require a reason only when a coding agent is detected.
• true: require it from every caller.
• false: never require it.

Because the policy lives in secretspec.toml and is enforced by SecretSpec, it applies to everyone and every CI runner, and is inherited through extends. Coding agents are spotted by the detect-coding-agent crate (Claude Code, Cursor, Codex, Gemini CLI, Copilot, and more); set SECRETSPEC_AGENT for a harness it doesn’t recognize.

Upgrading

cargo install secretspec

Remember the new default: agents must pass a reason: set require_reason = false to opt out.

Questions or feedback? Join us on Discord.