GLSL — 116 Operations for AI Agents

This page is the canonical reference an AI coding agent uses to refactor, query, and analyze GLSL code through the act MCP server. 116 operations available: 42 refactor, 18 query, 42 analysis, 14 verification. Each operation is callable from Claude Code, Cursor, Codex, OpenCode, or any MCP-compatible agent host. Click any operation for a stable anchor link suitable for citation.

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Worked GLSL examples

act101 edits GLSL shader source with the vertex/fragment stage structure the tree-sitter grammar exposes, so an edit targets a specific in/out/uniform declaration or the shader's main body rather than a raw text position. It can add a layout(location = N) qualifier to an existing input or output declaration, move a uniform declaration into a layout(std140) uniform block, and promote a const declaration to a runtime uniform. Every generated example here also passes the corpus's parse-check validation, so the edited file is a shader that a GLSL compiler accepts, not just text that matches byte-for-byte. Each example below is the verbatim output of the command shown, run against the file shown.

Add a layout qualifier to a vertex input

mesh.vert declares aPosition and aNormal as plain in vec3 attributes with no explicit binding location.

$ act refactor-lang add_layout_qualifier --file mesh.vert --params '{"location_index":0,"line":2,"column":1}'

Before

#version 330 core
in vec3 aPosition;
in vec3 aNormal;
out vec3 vNormal;
uniform mat4 uMVP;
void main() {
    vNormal = aNormal;
    gl_Position = uMVP * vec4(aPosition, 1.0);
}

After

#version 330 core
layout(location = 0) in vec3 aPosition;
in vec3 aNormal;
out vec3 vNormal;
uniform mat4 uMVP;
void main() {
    vNormal = aNormal;
    gl_Position = uMVP * vec4(aPosition, 1.0);
}

layout(location = 0) is prepended to the aPosition declaration; aNormal and the rest of the shader are untouched.

Apply De Morgan's law to a branch condition

shading.frag guards its lit path with isLit && isShadowed; inverting the condition is the first step in flipping the branch bodies.

$ act refactor-lang invert_boolean_logic --file shading.frag --params '{"line":5,"column":9}'

Before

#version 330 core
uniform bool isLit;
uniform bool isShadowed;
void main() {
    if (isLit && isShadowed) {
        discard;
    }
    gl_FragColor = vec4(1.0);
}

After

#version 330 core
uniform bool isLit;
uniform bool isShadowed;
void main() {
    if (!isLit || !isShadowed) {
        discard;
    }
    gl_FragColor = vec4(1.0);
}

if (isLit && isShadowed) becomes if (!isLit || !isShadowed) — each operand negated and the connective flipped, per De Morgan. The branch bodies and the rest of the shader are untouched.

Drop parentheses that carry no grouping

intensity.frag wraps a bare literal in parentheses, which say nothing about precedence.

$ act refactor-lang remove_unnecessary_parentheses --file intensity.frag --params '{"line":6,"column":23}'

Before

#version 330 core
out vec4 fragColor;
uniform vec3 uColor;

void main() {
    float intensity = (0.5);
    fragColor = vec4(uColor * intensity, 1.0);
}

After

#version 330 core
out vec4 fragColor;
uniform vec3 uColor;

void main() {
    float intensity = 0.5;
    fragColor = vec4(uColor * intensity, 1.0);
}

float intensity = (0.5); becomes float intensity = 0.5;. Only parentheses whose removal cannot change how the expression groups are dropped.

Query

18 query tools, the same on every supported language. Descriptions live in the shared reference: /docs/query-tools.

callers control_flow data_flow definition diagnostics effect_closure effect_summary fix_auto get_type graph import_organize interface mutations references repo_outline skeleton symbols symbols_batch

Refactor

Analysis

42 analysis tools, the same on every supported language. Descriptions live in the shared reference: /docs/analysis-tools.

analyze_api_diff analyze_chokepoints analyze_clones analyze_clusters analyze_cohesion analyze_conformance analyze_coupling analyze_cycle_risk analyze_cycles analyze_dead_code analyze_depth analyze_entry_points analyze_export analyze_extraction analyze_fan_balance analyze_features analyze_hotspots analyze_impact analyze_inconsistencies analyze_inheritance analyze_interface_bloat analyze_interfaces analyze_layers analyze_orphan_types analyze_patterns analyze_platform_deps analyze_readiness analyze_roles analyze_seams analyze_stability analyze_surface analyze_test_gaps analyze_thickness analyze_type_completeness churn_hotspots co_change_clusters coverage_overlay ownership_map profile_overlay simulate split_module trace_overlay

Verify

14 verify tools, the same on every supported language. Descriptions live in the shared reference: /docs/verification.

bisect_regression gate generate_test_harness scan secret_surface summarize_pr taint_flow unsafe_surface verify_behavioral_equivalence verify_contract_preserved verify_diff_semantics verify_port_parity verify_side_effects verify_test_impact