Pcd System

PCD System — Public Beta Reference Notes

This skill contains current public-beta PCD orientation for agents. For current public agent operation, install and use the brik64 skill first, then check https://docs.brik64.com before making release, command, or capability claims.

Current public CLI command: brik64. Compatibility alias: brik. Current public CLI version: 0.1.0-beta.18; verify public release status against docs and GitHub before presenting it as published. Current public CLI install path: curl -fsSL https://brik64.com/cli/install.sh | bash. Do not use npm to install the CLI. npm is reserved for SDK packages.

Current public surface:

• brik64 CLI public beta
• .brik local traceability metadata
• PCD 1.0 public standard: https://github.com/brik64/pcd-standard
• agent workflows that point to docs.brik64.com

Roadmap or non-current surface unless separately published:

• platform integration servers
• distribution catalogs
• domain-system drafts
• extended-operation drafts
• multi-target compilation claims
• formal certification claims
• compiler-sovereignty or reproducibility claims

Quick Start

curl -fsSL https://brik64.com/cli/install.sh | bash
brik64 --version
brik64 help
brik64 init
brik64 certify path/to/program.pcd
brik64 verify path/to/program.pcd
brik64 emit path/to/program.pcd
brik64 polymerize path/to/program.pcd --out polymer.pcd

PCD Orientation

Treat PCD as Program Circuit Description: a circuit description format for bounded logic. In public beta writing, point to brik64/pcd-standard and docs.brik64.com for the current versioned standard.

Current agent posture:

• write small, inspectable PCD candidates;
• keep input and output boundaries explicit;
• avoid claiming certification from syntax, examples, or CLI output alone;
• report exact CLI/runtime evidence when available;
• link to docs.brik64.com for the current command surface.

Example Pattern

// ai-safety-policy.pcd — ALLOW/BLOCK guardrail
PC file_write_policy {
    let action  = MC_63.ENV("ACTION");      // "write_file"
    let path    = MC_63.ENV("TARGET_PATH"); // "/etc/passwd"
    let agent   = MC_63.ENV("AGENT_ID");   // "gpt-4"

    fn is_protected_path(p) {
        let is_etc   = MC_42.SUBSTR(p, 0, 4) == "/etc";
        let is_sys   = MC_42.SUBSTR(p, 0, 4) == "/sys";
        let is_root  = p == "/";
        return is_etc + is_sys + is_root;
    }

    fn is_allowed_action(act) {
        // Allowlist approach: DENY by default
        let allowed = 0;
        if (act == "read_file")    { let allowed = 1; }
        if (act == "write_temp")   { let allowed = 1; }
        return allowed;
    }

    let protected = is_protected_path(path);
    let allowed   = is_allowed_action(action);

    let verdict = "BLOCK";
    if ((protected == 0) && (allowed == 1)) {
        let verdict = "ALLOW";
    }

    let code = MC_00.ADD8(1, 0);
    let _ = code;
    let _ = MC_58.WRITE(1, "\n", 1);

    OUTPUT verdict;
    return verdict;
}

EVA Composition

// Sequential: A ⊗ B — output of A feeds input of B
let h = hash_sha256_int(data);
let keyed = xor_bytes_int(h, key);

// Parallel: A ∥ B — independent execution
let (a, b) = (compute_x(input), compute_y(input));

// Conditional: A ⊕ B — select based on predicate
let result = if (check) { path_a(x) } else { path_b(x) };

CLI Boundary

Use the current public command name in examples:

brik64 --version
brik help
brik init

When you need command details, check docs.brik64.com and the installed CLI itself. Do not copy older brik64 command examples into public instructions unless the current release proves that exact command.

Standards Boundary

PCD 1.0 is maintained in the public standard repository:

https://github.com/brik64/pcd-standard

Use that repository and docs.brik64.com for current PCD 1.0 file format, authoring, examples, compatibility, and claim boundary. This skill orients agents; it should not replace the standard repository or present historical PCD notes as current normative grammar.