egressai 0.1.8

Local-first redaction engine for AI egress security

EgressAI

EgressAI is a local-first redaction engine for AI egress security.

The first package takes text, detects secrets, replaces them with stable placeholders, and returns structured findings without exposing plaintext secret values in the public result.

Install

pip install egressai

The package depends on egressai-detect-secrets for provider-aware secret detection.

Python API

Redact text:

from egressai import RedactionEngine

secret = "sk-proj-" + "a" * 40
engine = RedactionEngine()
result = engine.redact(f"OPENAI_API_KEY={secret}")

print(result.redacted_text)

Output:

OPENAI_API_KEY={{EGRESSAI_SECRET_OPENAI_001}}

Inspect structured findings:

for finding in result.findings:
    print(finding.type, finding.line, finding.column, finding.placeholder)

Output:

secret.openai_api_key 1 16 {{EGRESSAI_SECRET_OPENAI_001}}

Restore redacted text during the same engine session:

restored = engine.restore(result.redacted_text)

The restore map is memory-only and is not included in structured output.

Structured result:

payload = result.to_dict()

The structured output includes:

• redacted_text
• findings
• stats

Each finding includes zero-based character offsets (start, end) plus one-based line and column metadata for locating the sensitive value in files, logs, and pasted diffs.

Plaintext secret values are not included in result.to_dict().

Redact a larger pasted context:

text = """
OPENAI_API_KEY=sk-proj-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
GITHUB_TOKEN=ghp_bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
DATABASE_URL=postgres://admin:[e-mail]:5432/app
"""

result = RedactionEngine().redact(text)
print(result.redacted_text)

Output:

OPENAI_API_KEY={{EGRESSAI_SECRET_OPENAI_001}}
GITHUB_TOKEN={{EGRESSAI_SECRET_GITHUB_001}}
DATABASE_URL={{EGRESSAI_SECRET_DB_URL_001}}

CLI

Redact inline text:

egressai redact "OPENAI_API_KEY=sk-proj-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"

Output:

OPENAI_API_KEY={{EGRESSAI_SECRET_OPENAI_001}}

Redact a file:

egressai redact ./prompt.txt

Redact stdin:

cat ./logs.txt | egressai redact

Existing file paths are read from disk. Any other input is treated as literal text, including large multi-line contexts passed as one argument. For very large prompts or logs, stdin is usually the most reliable shell interface.

Return the full redaction result as JSON:

egressai redact --json ./sample.env

Scan without printing redacted text:

egressai scan ./sample.env

Return findings and stats as JSON:

egressai scan --json ./sample.env

Example JSON shape:

{
  "findings": [
    {
      "category": "secret",
      "column": 16,
      "confidence": 0.99,
      "detector": "egressai.openai_key",
      "end": 63,
      "id": "finding_000001",
      "line": 1,
      "placeholder": "{{EGRESSAI_SECRET_OPENAI_001}}",
      "severity": "critical",
      "start": 15,
      "type": "secret.openai_api_key"
    }
  ],
  "stats": {
    "findings_count": 1,
    "pii_count": 0,
    "secrets_count": 1
  }
}

Return one finding per JSON Lines record:

egressai scan --jsonl ./sample.env

Example JSONL record:

{"category":"secret","column":16,"confidence":0.99,"detector":"egressai.openai_key","end":63,"id":"finding_000001","line":1,"placeholder":"{{EGRESSAI_SECRET_OPENAI_001}}","severity":"critical","start":15,"type":"secret.openai_api_key"}

Fail when findings are present:

egressai scan --fail-on-findings ./sample.env

Use a custom placeholder prefix:

egressai redact --placeholder-prefix SAFE ./prompt.txt

Codex Integration

The repo includes a hook-only Codex plugin at plugins/egressai.

The plugin does not include skills. It uses event-specific Codex hook behavior:

• UserPromptSubmit blocks sensitive prompts and returns a redacted prompt for resubmission.
• PreToolUse rewrites the actual tool input with placeholders and allows execution.
• PostToolUse blocks sensitive tool results and returns only a redacted result to the model.

Hook invocations do not persist plaintext placeholder mappings. Each invocation uses an in-memory vault that is discarded when the hook exits. Same-session restoration is available through the Python library when one RedactionEngine instance owns both redaction and restoration.

Codex supports input replacement only for PreToolUse through hookSpecificOutput.updatedInput. It does not currently expose replacement fields for UserPromptSubmit or PostToolUse, so those events must block to prevent the original sensitive value from entering model context.

Install the local package before using the hooks:

python3 -m pip install --upgrade "egressai>=0.1.8"

Then add this repository marketplace to Codex, restart Codex, open /plugins, and install EgressAI:

codex plugin marketplace add .

After installing, open /hooks to review and trust the EgressAI hook definitions. PreToolUse findings should show a successful input rewrite. Prompt and post-tool findings should be blocked with only redacted feedback.

Larger Context Example

The fixture at tests/fixtures/messy_context.txt contains a pasted support/debug report with a code diff, request headers, curl command, JSON payload, env vars, repeated provider keys, JWTs, database URLs, and an Azure connection string.

Run it through the CLI:

egressai redact tests/fixtures/messy_context.txt

The redacted output preserves the surrounding debugging context while replacing secrets with provider-aware placeholders such as:

OPENAI_API_KEY="{{EGRESSAI_SECRET_OPENAI_001}}"
GITHUB_TOKEN="{{EGRESSAI_SECRET_GITHUB_001}}"
"Authorization": "Bearer {{EGRESSAI_TOKEN_JWT_001}}"
DATABASE_URL="{{EGRESSAI_SECRET_DB_URL_001}}"

Exit Codes

By default, CLI commands exit 0 even when findings are detected.

With --fail-on-findings:

• exits 0 when no findings are detected
• exits 1 when findings are detected
• exits 2 for CLI usage errors

Supported Secret Types

Initial support includes:

• OpenAI API keys
• Anthropic API keys
• Google/Gemini API keys
• GitHub tokens
• GitLab tokens
• AWS access keys
• Stripe keys
• Slack tokens
• npm tokens, including .npmrc auth tokens and NPM_TOKEN=npm_... env values
• PyPI tokens
• Hugging Face tokens
• JWTs, including JWT-like tokens with non-base64url signature suffixes
• private key blocks
• database URLs, including JSON-escaped URL values such as postgres:\/\/...
• Azure connection strings
• generic .env-style secret assignments

Provider mappings are covered by tests so each supported detector returns the expected EgressAI type, detector name, and placeholder subtype.

The test suite includes a messy real-world fixture with a pasted user report, code diff, curl commands, runtime env vars, JSON payloads, repeated secrets, and multiple provider token types.

Release Notes

0.1.5

• Added hook-only Codex plugin scaffolding.
• Added local egressai.codex_hook hook runner and egressai-codex-hook console script.

0.1.4

• Expanded README examples and usage documentation.

0.1.3

• Added finding line and column metadata.
• Added same-session restore support through RedactionEngine.restore().
• Added a messy real-world fixture corpus.
• Added JSON-escaped database URL redaction.
• Added egressai scan --jsonl.

Maintainer Notes

Every user-visible change should update this README in the same change set.

Before publishing:

python3 -m pytest
python3 -m build
python3 -m twine check dist/egressai-*

Publish the current release artifacts:

LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8 PYTHONIOENCODING=utf-8 python3 -m twine upload dist/egressai-0.1.5*