Configuration

Skryba has no configuration file. The CLI reads flags and environment variables; flags backed by clap environment bindings win over the environment. Skryba Desktop optionally supplies missing environment variables from ~/.config/skryba/env before spawning the CLI.

Model inference

Variable / flag	Default	Reader	Meaning
BRAMA_URL / --brama-url	https://brama.wisent.com	src/main.rs	base URL; Skryba appends /v1/chat/completions
BRAMA_TOKEN	none; required for rewrite, train, benchmark	src/brama.rs	bearer client token
SKRYBA_MODEL / --model	claude-code-subscription	src/main.rs	generator model sent to Brama
SKRYBA_JUDGE_MODEL / --judge-model	generator model	src/main.rs	quality-judge model
SKRYBA_AGENT_ID	unset	src/brama.rs	optional agent identity; pair with the secret
SKRYBA_AGENT_AUTH_SECRET	unset	src/brama.rs	optional HMAC secret; pair with agent id

Agent id and secret are all-or-nothing. Empty strings count as unset.

Detector selection and cache

Variable / flag	Default	Reader	Meaning
GPTZERO_API_KEY	unset	src/detectors.rs	enables GPTZero
WINSTON_API_KEY	unset	src/detectors.rs	enables Winston
ORIGINALITY_API_KEY	unset	src/detectors.rs	enables Originality.ai
SAPLING_API_KEY	unset	src/detectors.rs	enables Sapling
GPTZERO_API_URL	https://api.gptzero.me/v2/predict/text	src/detectors.rs	endpoint override
WINSTON_API_URL	https://api.gowinston.ai/v2/ai-content-detection	src/detectors.rs	endpoint override
ORIGINALITY_API_URL	https://api.originality.ai/api/v3/scan	src/detectors.rs	endpoint override
SAPLING_API_URL	https://api.sapling.ai/api/v1/aidetect	src/detectors.rs	endpoint override
SKRYBA_CACHE / --cache	~/.cache/skryba/detector-scores.sqlite3	src/main.rs	SQLite score cache
--detectors	infer from non-empty API keys	src/main.rs, src/detectors.rs	comma-separated provider names
--detector-interval-ms	250	src/main.rs	minimum interval per detector

Endpoint overrides are primarily for controlled deployments and offline fixtures. The endpoint is part of the cache namespace, so an override cannot reuse a different endpoint's scores.

RentAHuman

Variable	Default	Reader	Meaning
RENTAHUMAN_API_KEY	none; required	src/rentahuman.rs	sent as X-API-Key
RENTAHUMAN_API_URL	https://rentahuman.ai/api	src/rentahuman.rs	HTTPS base URL

The URL must have an HTTPS scheme and host, with no credentials, query, or fragment. The API key may not contain control characters.

Other CLI controls

These are flags rather than environment keys:

Flag	Default	Scope
--minimum-quality	0.90	global judge threshold
rewrite --candidates	8	candidates per chunk
rewrite --max-words-per-chunk	400	chunk budget
rewrite/train/benchmark --temperature	0.9	generator temperature
rewrite/train/benchmark/corpus --seed	42	deterministic local sampling/order

All command-specific defaults are in CLI reference, train and benchmark, and RentAHuman.

Desktop environment file

~/.config/skryba/env syntax:

# comments and blank lines are ignored
BRAMA_TOKEN=value
SAPLING_API_KEY=value

Each non-comment line is split at its first =. Key and value are trimmed. Empty keys and malformed lines are ignored. A variable already present in the app's launch environment wins; the file fills only missing keys. The CLI itself does not read this file.