feat: Add useConsentModel functionality

[ellisong]

Adds use_consent_mode init property and functionality. Adds the consent() API call. The consent model, if enabled, disallows agent harvesting unless consent is given through the consent() API call.

Overview

Adds useConsentModel init property and functionality (defaults to false). When turning useConsentModel on, the agent will not harvest (send over the network) until given "consent". Consent is given by the consent value in the session entity's local storage being set to true.

Adds an API method called consent(accept?: boolean) that changes the consent value in the session entity's local storage. Calling true or undefined for the argument grants consent, calling false in consent() rejects consent.

Agent features are still manually or automatically started regardless of consent being enabled or not, but they won't send data over the network unless consent is granted.

Also adds a .nvmrc file for node version 22.11

Related Issue(s)

JIRA: https://new-relic.atlassian.net/browse/NR-438120
JIRA: https://new-relic.atlassian.net/browse/NR-438139

Testing

Tests are provided that tests the agent harvest blocking if the consent model is enabled in various situations. The default case (consent model not being enabled) is not tested since that's already covered.

[github-actions]

Supportability Metric Usage Changes:

No matching changes found

Supportability Metrics .md File Changes:

supportability_metrics.md was changed? false

New supportability metrics require changes to supportability_metrics.md, as well as a new PR to Angler. Please ensure an Angler PR is created and linked to this PR.

[github-actions]

Asset Size Report

Merging this pull request will result in the following asset size changes:

Agent	Asset	Previous Size	New Size	Diff
lite	loader	25.96 kB / 9.8 kB (gzip)	26.18 kB / 9.86 kB (gzip)	0.84% / 0.58% (gzip)
lite	async-chunk	54.01 kB / 18.09 kB (gzip)	54.44 kB / 18.24 kB (gzip)	0.79% / 0.8% (gzip)
pro	loader	54.47 kB / 19.25 kB (gzip)	54.69 kB / 19.31 kB (gzip)	0.4% / 0.3% (gzip)
pro	async-chunk	92.74 kB / 29.07 kB (gzip)	93.16 kB / 29.2 kB (gzip)	0.46% / 0.45% (gzip)
spa	loader	63.32 kB / 21.95 kB (gzip)	63.54 kB / 22 kB (gzip)	0.34% / 0.26% (gzip)
spa	async-chunk	118.14 kB / 36.35 kB (gzip)	118.57 kB / 36.5 kB (gzip)	0.36% / 0.42% (gzip)

[codecov]

Codecov Report

❌ Patch coverage is 72.41379% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.27%. Comparing base (9770132) to head (cde8554).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/features/utils/agent-session.js	50.00%	2 Missing and 1 partial ⚠️
src/features/page_view_event/aggregate/index.js	33.33%	1 Missing and 1 partial ⚠️
src/loaders/api-base.js	0.00%	2 Missing ⚠️
src/loaders/agent.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1533      +/-   ##
==========================================
- Coverage   88.32%   88.27%   -0.06%     
==========================================
  Files         206      207       +1     
  Lines        7776     7793      +17     
  Branches     1591     1597       +6     
==========================================
+ Hits         6868     6879      +11     
- Misses        794      798       +4     
- Partials      114      116       +2     

Flag	Coverage Δ
unit-tests	81.58% <72.41%> (-0.05%)	⬇️

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[github-actions]

Last ran on November 10, 2025 14:55:45 CST
Checking merge of (8d19cd3) into main (9770132)

[ellisong]

Adding API changes to PR, do not merge until ready.

[metal-messiah]

can you please add type-check conditions for your new API method to api.test-d.ts to ensure that the typings worked correctly.

[metal-messiah]

we also haven't been very good about updating init-types.js but we probably should start to update that whenever we update the init.js file

[metal-messiah]

very minor comment, i am fine with leaving as-is or changing. LGTM

[metal-messiah]

Blocked until API team is out of code freeze and can implement settings changes.

[metal-messiah]

manually blocking to prevent accidental merge