klickd 4.0.0

Official Python library for reading and writing .klickd portable AI context files

klickd

Official Python library for reading and writing .klickd portable AI context files.

One soul. Any model. Any agent. — open-source security and continuity layer for every actor in AI.

Official page for the open .klickd format → klickd.app/klickdskill

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Install

pip install klickd

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Quick start

Load (decrypt) a .klickd file

from klickd import load_klickd

with open("context.klickd", "rb") as f:
    payload = load_klickd(f.read(), passphrase="my-passphrase")

print(payload["identity"]["name"])
print(payload["memory"])

Save (encrypt) a .klickd file

from klickd import save_klickd

payload = {
    "payload_schema_version": "3.0.0",
    "domain_schema_version": "1.0.0",
    "identity": {"name": "Alice", "language": "en", "timezone": "Europe/Luxembourg"},
    "agent_instructions": "Be concise.",
    "memory": [],
}

klickd_bytes = save_klickd(payload, passphrase="my-passphrase", domain="education")

with open("context.klickd", "wb") as f:
    f.write(klickd_bytes)

Legacy v2.x files (PBKDF2)

payload = load_klickd(file_bytes, passphrase="my-passphrase", legacy=True)

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.klickd v4 — GA strict + preview fields

This library targets the v3 envelope on the wire (envelope crypto contract is frozen at v3 per SPEC.md §33.10 #2) and ships the v4 GA strict candidate payload schema for validation. The v4 preview track (v4.0.0-preview.1) remains accepted in parallel.

The v4 additive payload fields — profile_kind, media_profile, verification_gates, human_veto_policy, claim_sources, verification_artifacts, migration, context_cost, deprecated_fields — are preserved verbatim on round-trip (SPEC.md §33.7). load_klickd returns the raw decrypted JSON object; save_klickd re-encrypts it without filtering unknown keys.

Optional v4 schema validation

Install the optional validate extra to enable strict / preview schema validation against the bundled v4 JSON schemas (RFC-001 v1, RFC-002 v1 core, RFC-004 v1):

pip install klickd[validate]

from klickd import validate, validate_iter_errors

payload = {
    "payload_schema_version": "4.0",
    "verification_gates": {
        "version": 1,
        "gates": [
            {"action_class": "public_post", "level": "block"},
        ],
    },
}

validate(payload, strict=True)  # raises KlickdError(KLICKD_E_SCHEMA) on fail

# Non-raising variant that returns every (path, message):
errors = validate_iter_errors(payload, strict=True)

validate(..., strict=False) selects the permissive v4 preview schema. validate(..., target="unified") selects the unified envelope+payload schema. The strict schema accepts both "4.0" and "4.0.0-preview.1" in payload_schema_version so preview files round-trip without rewriting.

v4_preview_payload = {
    "payload_schema_version": "4.0.0-preview.1",
    "domain_schema_version": "1.0.0",
    "profile_kind": "learner",
    "verification_gates": {"public_post": "confirm"},
    # ... any additional v4 preview fields are preserved on save/load
}
recovered = load_klickd(save_klickd(v4_preview_payload, "passphrase"), passphrase="passphrase")
assert recovered == v4_preview_payload

See SPEC.md §33 and examples/v4-preview/ for the preview-track details.

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Cryptographic specification (v3.0)

Parameter	Value
KDF (default)	Argon2id — m=65536, t=3, p=1
KDF (legacy)	PBKDF2-SHA256 / 600 000 iterations
Cipher	AES-256-GCM
AAD	RFC 8785 JCS over 6 canonical fields
Base64	RFC 4648 §4 standard padded
Salt	16 bytes (CSPRNG)
IV	12 bytes (CSPRNG)

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Error codes

Code	HTTP	Meaning
KLICKD_E_AUTH	401	Wrong passphrase / GCM tag mismatch
KLICKD_E_VERSION	400	Unsupported klickd_version major
KLICKD_E_FORMAT	400	Malformed JSON envelope / missing fields
KLICKD_E_KDF	400	Unknown or unavailable KDF
KLICKD_E_WEAK_PASS	422	Passphrase shorter than 8 characters
KLICKD_E_SCHEMA	400	Missing payload_schema_version

from klickd import KlickdError, KlickdErrorCode

try:
    payload = load_klickd(data, passphrase="wrong")
except KlickdError as e:
    print(e.code)         # KlickdErrorCode.AUTH
    print(e.http_status)  # 401

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Links

• Format page: klickd.app/klickdskill
• Specification: SPEC.md
• Repository: github.com/Davincc77/klickdskill
• DOI: 10.5281/zenodo.20383133 (v4.0.0) · concept DOI (all versions): 10.5281/zenodo.20262530
• Homepage: klickd.app/klickdskill

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License

CC0 1.0 Universal — Public Domain Dedication.
Author: Vincenzo Cirilli (.klickd / klickd.app, Luxembourg)