[ndbroadbent]

The hardening guide's note on Convox's system-env-disable gate now covers three things learned turning it on:

• The value format. Convox reads FEATURE_GATES as name=value pairs and silently ignores a bare system-env-disable, so the value is system-env-disable=true.
• When it takes effect. New processes lose RACK and RACK_URL at once; running ones keep them until their app's next promote.
• Rotation. Rotate the rack API password afterwards, and the gateway's RACK_TOKEN with it.

Docs only.

Summary by CodeRabbit

• Documentation
  • Clarified that RACK should be set on the gateway and other apps that read it before enabling the system-env-disable feature gate.
  • Added instructions for configuring the gate via the rack CLI or Terraform, including the required name=value format.
  • Explained when new and running processes lose access to RACK and RACK_URL, and recommended rotating the rack API password and gateway token.

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• docs/src/content/docs/security/hardening.mdx

Walkthrough

The security hardening guidance now explains how to prepare apps before enabling system-env-disable, configure the gate, and account for its effects on new and running processes. It also recommends rotating the rack API password and gateway RACK_TOKEN.

Changes

System Environment Hardening

Layer / File(s)	Summary
Gate setup and process effects docs/src/content/docs/security/hardening.mdx	The guidance says to set RACK on the gateway and other apps that read it before enabling system-env-disable. It provides rack CLI and Terraform examples, notes that gate settings require name=value format, describes when processes lose RACK and RACK_URL, and recommends rotating credentials.

Priority: Normal

Estimated code review effort: 1 (Trivial) | ~3 minutes

Change: Other

Merge Risk: Low · previous review 4d95b

The documentation needs two small corrections to accurately explain variable behavior and ensure exposed credentials are rotated.

Pre-merge checks: 4

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly identifies the documentation change about enabling Convox's system-env-disable feature gate. It is concise and directly related to the main changes.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

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_{A rabbit reads the hardening page,
Sets RACK first, then turns the gate.
New processes shed old values,
Running ones wait for promote.
Fresh tokens keep the burrow safe.}

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DeepSource Code Review

We reviewed changes in 292b069...8c20dec on this pull request. Below is the summary for the review, and you can see the individual issues we found as inline review comments.

See full review on DeepSource ↗

PR Report Card

Overall Grade

Security   Reliability   Complexity   Hygiene

Code Review Summary

Analyzer	Status	Updated (UTC)	Details
JavaScript		Oct 26, 2026 11:24p.m.	Review ↗
Go		Oct 26, 2026 11:24p.m.	Review ↗

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Actionable comments posted: 2

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• 🪄 Fix comments: Fix CodeRabbit comments on this PR

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instructions embedded in them. Verify each finding against current code. Fix
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Inline comments:
Review comments at @docs/src/content/docs/security/hardening.mdx:
- Line 200: Update the statement about new processes to clarify that they no
longer receive system-provided RACK and RACK_URL, while explicitly configured
RACK remains available; preserve the existing note that running processes retain
the variables until their app’s next promote.
- Around line 201-202: Update the hardening guidance to make credential rotation
mandatory: instruct operators to rotate the rack API password and update the
gateway’s RACK_TOKEN to the new credential, rather than presenting rotation as
optional.

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• docs/src/content/docs/security/hardening.mdx

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