[lucaspimentel]

What does this PR do?

Adds MockIntakeOptions::disable_captures, off by default. When set, the mock intake keeps no captures in memory: stats_payloads(), trace_payloads(), pipeline_stats_payloads() and requests_for_path() return nothing, and no raw CapturedRequest is built or stored.

Everything else is unchanged: decoding, response status codes, request summaries, JSON dumps, request ids and stats failure injection all still happen.

Motivation

The standalone mock intake binary in datadog-lambda-extension (bottlecap/src/bin/mock-intake/main.rs) never reads the captures, so its memory grows without limit while it runs. This gives that binary a way to turn captures off.

Additional Notes

• Building the capture is skipped entirely, so the body copy and header strings are not made and the captures lock is not taken.
• This is a breaking change for any caller that lists every field of MockIntakeOptions in a struct literal. datadog-lambda-extension does this, so its pin bump must add disable_captures: true in the same change, otherwise it stops compiling.
• Only the new test in this repo sets the flag, so the intended user is the Bottlecap binary.

Describe how to test/QA your changes

New test disable_captures_keeps_responses_and_dumps_but_stores_nothing covers the flag on: unchanged statuses (including failure injection), one JSON dump per decoded attempt, and empty results from all four query methods.

cargo test -p datadog-mock-intake passes, and cargo fmt --check and cargo clippy -p datadog-mock-intake --all-targets -- -D warnings are clean.

[lucaspimentel]

@DataDog review

[datadog-datadog-prod-us1-2]

More details

The capture flag gates raw-request construction and capture storage while preserving decoding, failure injection, response handling, and JSON dumps. The static reviewer identified no actionable defects.

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Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-11-05T15:57:31.642060Z	fc89cb1	Draft marked ready
🔒 Security Review	✅ Completed 2026-11-05T15:59:03.134298Z	fc89cb1	Draft marked ready

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[Copilot]

🟢 Approval recommended

The opt-in capture-disable change has no active review issues.

No open issues 🎉

What changed in this PR

Adds an opt-in capture-disable mode to the shared mock intake, allowing long-running consumers to avoid accumulating captures in memory while preserving request processing and diagnostics.

Changes:

• Adds MockIntakeOptions::disable_captures, defaulting to false.
• Skips raw capture construction and capture storage when enabled.
• Adds coverage for unchanged response statuses, failure injection, JSON dumps, and empty capture queries.

Size: 10 added and 7 removed core-code lines, excluding documentation; 75 added test lines.

File	Description
crates/​datadog-mock-intake/​src/​lib.rs	Adds and documents the option, gates capture creation and storage, and tests disabled-capture behavior.

_{Review effort: Balanced}