Bug: Content filter blocks output but user is still billed for full generation cost

[arshbuttar426-hue]

Description

When the opencode content filter flags and blocks a response, the user is still billed for the full token generation cost. The user receives zero output but pays as if the response was delivered.

This is a billing system bug — the charge should not be applied (or should be reversed) when the platform's own guardrail prevents delivery.

This is related to but distinct from my incident in #35475. That issue documents a specific false-positive charge. This issue identifies the systemic bug that allows the charge to happen in the first place.

OpenCode version

Latest (authed via GitHub CLI, using opencode CLI)

Steps to reproduce

1. Generate a response that triggers the content filter (false positive)
2. The output is fully blocked — user sees nothing
3. Check usage logs — tokens are billed as if the response was delivered
4. User is charged for output they never received

Plugins

None

Operating System

macOS (Apple Silicon)

Terminal

iTerm2

[github-actions]

This issue doesn't fully meet our contributing guidelines.

What needs to be fixed:

• No issue template used. All issues must use one of the three templates: Bug Report, Feature Request, or Question. A billing dispute/support escalation does not fit as a standalone issue in this format.
• This appears to be a duplicate of your earlier issue False positive content-filter on claude-fable-5 — charged ~$20 for blocked output #35475, which already documents the same billing dispute with the same ~$20 content-filter charge. Please continue the discussion there rather than opening additional issues for the same matter.

Please edit this issue to address the above within 2 hours, or it will be automatically closed.

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This issue might be a duplicate of existing issues. Please check:

• False positive content-filter on claude-fable-5 — charged ~$20 for blocked output #35475: Same billing dispute — content-filter false positive, ~$20 charged for zero output, opened by the same author
• Content filter charges users for output it blocks — this needs a billing safeguard #35644: Content filter billing safeguard request — same root issue, opened simultaneously
• No human support response on billing dispute — escalation request #35645: Support escalation for the same billing dispute — opened simultaneously

If you believe this was flagged incorrectly, please let a maintainer know.

[github-actions]

Thanks for updating the issue! It now follows the contributing guidelines and looks good. We appreciate you providing a clear description, steps to reproduce, and system info.