feat(utils): add file sink classes

[BioPhoton]

This PR includes:

• types for source sink flows
• text sink class
• jsonl sink class

[nx-cloud]

View your CI Pipeline Execution ↗ for commit 4c95897

Command	Status	Duration	Result
nx run-many --targets=code-pushup --parallel=fa...	❌ Failed	12m 28s	View ↗
nx run-many -t unit-test,int-test	✅ Succeeded	1m 50s	View ↗

---

☁️ Nx Cloud last updated this comment at 2026-01-10 01:08:15 UTC

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commit: 4c95897

[github-actions]

Code PushUp

🤨 Code PushUp report has both improvements and regressions – compared current commit 72275e4 with previous commit 7d3681c.

🕵️ See full comparison in Code PushUp portal 🔍

🏷️ Categories

🏷️ Category	⭐ Previous score	⭐ Current score	🔄 Score change
Performance	🔴 37	🔴 32
Documentation	🔴 34	🔴 30
Code style	🟢 99	🟢 98
Bug prevention	🟡 75	🟡 74
Code coverage	🟢 91	🟢 91
Axe Accessibility	🟡 88	🟡 88
Security	🟡 51	🟡 51	–
Updates	🟡 78	🟡 78	–
Type Safety	🟡 67	🟡 67	–
Miscellaneous	🟡 67	🟡 67	–
Accessibility	🟢 92	🟢 92	–
Best Practices	🟢 100	🟢 100	–
SEO	🟢 92	🟢 92	–

👍 1 group improved, 👎 6 groups regressed, 👍 3 audits improved, 👎 20 audits regressed, 13 audits changed without impacting score

🗃️ Groups

🔌 Plugin	🗃️ Group	⭐ Previous score	⭐ Current score	🔄 Score change
ESLint	No Mutations (functional)	🟢 100	🔴 0
ESLint	No Statements (functional)	🟢 100	🔴 0
Lighthouse	Performance	🔴 37	🔴 32
JSDocs coverage	Documentation coverage	🔴 34	🔴 30
ESLint	Problems	🟢 100	🟢 97
ESLint	Suggestions	🟢 99	🟢 98
Code coverage	Code coverage metrics	🟢 91	🟢 91

27 other groups are unchanged.

🛡️ Audits

🔌 Plugin	🛡️ Audit	📏 Previous value	📏 Current value	🔄 Value change
Lighthouse	Initial server response time was short	🟩 Root document took 400 ms	🟥 Root document took 660 ms
ESLint	disallow synchronous methods	🟩 passed	🟥 39 warnings
ESLint	Disallow the any type	🟩 passed	🟥 4 errors
ESLint	Enforce that class methods utilize this	🟩 passed	🟥 4 warnings
ESLint	Enforce treating data as immutable.	🟩 passed	🟥 3 errors
ESLint	Disallow unused variables	🟩 passed	🟥 2 errors
ESLint	Enforce specific import styles per module.	🟩 passed	🟥 2 warnings
ESLint	Disallow mutable variables.	🟩 passed	🟥 2 warnings
ESLint	Disallow non-null assertions using the ! postfix operator	🟩 passed	🟥 2 errors
ESLint	Disallow imperative loops.	🟩 passed	🟥 1 warning
ESLint	require describe block to be less than set max value or default value	🟩 passed	🟥 1 warning
Lighthouse	Speed Index	🟥 5.9 s	🟥 7.2 s
JSDocs coverage	Methods coverage	🟥 13 undocumented methods	🟥 26 undocumented methods
Lighthouse	First Contentful Paint	🟥 3.0 s	🟥 3.5 s
Lighthouse	Total Blocking Time	🟥 1,990 ms	🟥 2,760 ms
JSDocs coverage	Classes coverage	🟥 7 undocumented classes	🟥 9 undocumented classes
Lighthouse	Time to Interactive	🟥 13.0 s	🟥 13.7 s
Code coverage	Function coverage	🟩 93.4 %	🟩 93.6 %
JSDocs coverage	Types coverage	🟥 260 undocumented types	🟥 263 undocumented types
Code coverage	Line coverage	🟨 86.2 %	🟨 86.3 %
JSDocs coverage	Variables coverage	🟥 271 undocumented variables	🟥 276 undocumented variables
Code coverage	Branch coverage	🟨 87.3 %	🟨 87.3 %
JSDocs coverage	Functions coverage	🟥 597 undocumented functions	🟥 598 undocumented functions
Lighthouse	Avoids enormous network payloads	🟩 Total size was 2,113 KiB	🟩 Total size was 2,119 KiB
Lighthouse	Minimizes main-thread work	🟥 8.9 s	🟥 11.6 s
Lighthouse	JavaScript execution time	🟥 4.4 s	🟥 5.7 s
Lighthouse	Largest Contentful Paint	🟥 11.4 s	🟥 12.4 s
Lighthouse	Metrics	🟩 100%	🟩 100%
Lighthouse	Uses efficient cache policy on static assets	🟨 31 resources found	🟨 31 resources found
Lighthouse	Max Potential First Input Delay	🟥 1,040 ms	🟥 1,510 ms
Lighthouse	Server Backend Latencies	🟩 1,050 ms	🟩 900 ms
Lighthouse	Reduce unused CSS	🟥 Potential savings of 95 KiB	🟥 Potential savings of 95 KiB
Lighthouse	Network Round Trip Times	🟩 0 ms	🟩 50 ms
Lighthouse	Reduce unused JavaScript	🟥 Potential savings of 200 KiB	🟥 Potential savings of 222 KiB
Lighthouse	Remove duplicate modules in JavaScript bundles	🟥 Potential savings of 103 KiB	🟥 Potential savings of 106 KiB
JSDocs coverage	Properties coverage	🟥 24 undocumented properties	🟥 26 undocumented properties

643 other audits are unchanged.