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NVDA Addon Development Specialist · community-access | DecimalAI

codingby community-access

NVDA Addon Development Specialist

community-access/nvda-addon-development-specialist

Source community-access/accessibility-agents ↗License MIT

Expert in NVDA screen reader addon development covering architecture, APIs, plugin types (globalPlugins, appModules, synthDrivers, brailleDisplayDrivers), manifest format, event/script handling, NVDAObject overlays, tree interceptors, addon packaging, Add-on Store submission, testing with NVDA, and

SkillScore95Maintained

Automatic

Coding pack

Last verified 8/22/2026

What it changes

Passed 21 of 22 test cases with the skill, and 11 of 22 without it.

Without skill50%

With skill95%

Checks it passed that the model alone missed

Sets minimumNVDAVersion to 2026.1.0.
Assigns Serious severity to rule NVDA-010.
Assigns Critical severity to rule NVDA-017.

and 14 more in the full report

11 fixed10 passed either way0 still failing1 broke

Pass-rate lift: +45 pp
Tokens: +128%
Agent turns: 0%
Response time: -32%

Model gemini-3.6-flashMeasured 8/22/2026v121 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/community-access-nvda-addon-development-specialist/SKILL.md https://app.decimal.ai/s/community-access-nvda-addon-development-specialist-c08fab/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add community-access-nvda-addon-development-specialist-c08fab, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/community-access-nvda-addon-development-specialist/ and pins it in .decimal/skills.lock

decimalai skills add community-access-nvda-addon-development-specialist-c08fab

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/community-access-nvda-addon-development-specialist/SKILL.md https://app.decimal.ai/s/community-access-nvda-addon-development-specialist-c08fab/SKILL.md

Raw file: /s/community-access-nvda-addon-development-specialist-c08fab/SKILL.md ↗ · machine-readable summary at /s/community-access-nvda-addon-development-specialist-c08fab.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 11

Prompt

We need hands-on manual testing and coaching for screen reader behavior across both NVDA and JAWS to verify speech feedback during fast typing. Which specialist role should handle this request?

What was checked, without and with the skill
Checked	Without skill	With skill
Routes screen reader manual testing tasks to desktop-a11y-testing-coach.	Missed	Passed

case-20 · gemini-3.6-flash · 8/22/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md243 linessingle file

NVDA Addon Development Specialist

Core Principles

Source code is the authority. Every claim verified against the NVDA source.
Never block the main thread. Blocking calls freeze all speech, braille, and input.
Always call nextHandler(). Event handlers must pass events downstream.
Use the @script decorator. Modern pattern, not legacy __gestures dicts.
Test with the real screen reader. Verify addons with NVDA itself.
Package for the Add-on Store. Follow the official submission process.

NVDA 2026.1 Architecture Transition

NVDA 2026.1 is a major architecture transition and an add-on API compatibility breaking release. All addons must be re-tested and have their manifests updated.

64-bit Transition

NVDA is now built with Python 3.13, 64-bit. The 32-bit era is over.
32-bit Windows is no longer supported. Windows 10 (Version 1507) 64-bit is the new minimum.
Windows 10 on ARM is dropped. ARM64 support targets Windows 11 only (via ARM64EC libraries).
No backward-compatibility layer for 32-bit native libraries. Addons shipping 32-bit .dll files or using 32-bit ctypes bindings will break. Recompile all native code as 64-bit.
NVDAHelper.localLib changed from ctypes.CDLL to a module - use .dll attribute for the CDLL object.
The Microsoft Universal C Runtime is no longer bundled.

SAPI Restructuring

sapi5 now refers to 64-bit SAPI 5 voices.
Use sapi5_32 to access 32-bit SAPI 5 voices (no audio ducking support).
sapi4 removed entirely - use sapi4_32 instead (no audio ducking support).

Key API Breaking Changes

versionInfo split: copyrightYears and url moved to buildVersion module.
winUser, winKernel, winGDI, shellapi, hwIo.hid.hidDll symbols moved to winBindings.* submodules.
Screen Curtain: visionEnhancementProviders.screenCurtain replaced with screenCurtain subpackage.
MathPlayer removed: comInterfaces.MathPlayer and mathPres.mathPlayer are gone.
ftdi2 refactored into a package with snake_case functions, new enums, and typed FFI bindings.
gui.nvdaControls.TabbableScrolledPanel removed - use wx.lib.scrolledpanel.ScrolledPanel.

Track record

Benchmark

21 / 22

test cases passed, vs 11 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

community-access / accessibility-agents

.gemini/extensions/a11y-agents/skills/nvda-addon-specialist/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

community-access/NVDA Addon Development SpecialistExpert in NVDA screen reader addon development -- architecture, APIs, plugin types (globalPlugins, appModules, synthDrivers, brailleDisplayDrivers), manifest format, event/script handling, NVDAObject overlays, tree interceptors, addon packaging, Add-on Store submission, testing with NVDA, braille table and speech dictionary authoring, and internationalization. Grounded in the official NVDA source code (github.com/nvaccess/nvda) and community development guides.Close match+50 pp pass-rate lift

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

NVDA Addon Development Specialist

Core Principles

NVDA 2026.1 Architecture Transition

64-bit Transition

SAPI Restructuring

Key API Breaking Changes

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills