Amr Gharbeia
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- Remove system-prompt-augment mechanism, introduce *standing-mandates* - Fix false token-overhead claims in DESIGN_DECISIONS + ROADMAP - Update security vector count 9-10 across all docs and dispatcher docstring - Rewrite README with agent section, soften aspirational claims - Register 10 cognitive tools in programming-tools.org with test suite - Enforce NO-HARDCODED-CONSTANTS in .env.example - ROADMAP: mark v0.3.x patches DONE, add LOGBOOKs, mark releases - AGENTS.md: rewrite compact (180 to 50 lines), move refs to CONTRIBUTING - Normalize org tangle directives to file-level PROPERTY inheritance
99 lines
3.4 KiB
Org Mode
99 lines
3.4 KiB
Org Mode
#+TITLE: SKILL: Tool Permissions (org-skill-tool-permissions.org)
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#+AUTHOR: Agent
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#+FILETAGS: :skill:security:permissions:
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#+PROPERTY: header-args:lisp :tangle ../lisp/security-permissions.lisp
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* Overview: The Authorization Matrix
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Every cognitive tool (file read, file write, shell execute, etc.) has a permission level: ~:allow~ (executed without asking), ~:ask~ (user is prompted before execution), or ~:deny~ (blocked entirely). Tool Permissions maintains the registry of these levels and provides the ~permission-gate-check~ that the Dispatcher calls before dispatching a tool action.
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The complexity lives in the Dispatcher (security-dispatcher.org), which
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consults this table as one of its ten scan vectors.
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** Contract
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1. (permission-set tool-name level): stores ~level~ for ~tool-name~
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in ~*permission-table*~. Tool names are normalized to lowercase.
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2. (permission-get tool-name): returns the stored level, or ~:ask~ if
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no entry exists.
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3. Tool name matching is case-insensitive — ~(permission-set :FOO :allow)~
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and ~(permission-get :foo)~ return ~:allow~.
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** Boundaries
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- Does NOT enforce permissions — the Dispatcher does that.
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- Does NOT persist permissions to disk — this is runtime-only.
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- Does NOT validate that ~level~ is one of ~(:allow :ask :deny)~.
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* Implementation
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** Package Context
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#+begin_src lisp
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(in-package :passepartout)
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#+end_src
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** Permission store (tool level)
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Hash table mapping tool names to their permission level.
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;; REPL-VERIFIED: 2026-05-03T13:00:00
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#+begin_src lisp
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(defvar *permission-table* (make-hash-table :test 'equal))
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#+end_src
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** Set permission
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Sets the permission level for a specific cognitive tool.
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;; REPL-VERIFIED: 2026-05-03T13:00:00
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#+begin_src lisp
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(defun permission-set (tool-name level)
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"Sets the permission level for a tool."
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(setf (gethash (string-downcase (string tool-name)) *permission-table*) level))
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#+end_src
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** Get permission
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Retrieves the current permission level for a tool. Defaults to ~:ask~ if unset.
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;; REPL-VERIFIED: 2026-05-03T13:00:00
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#+begin_src lisp
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(defun permission-get (tool-name)
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"Retrieves the permission level for a tool. Defaults to :ask."
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(gethash (string-downcase (string tool-name)) *permission-table* :ask))
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#+end_src
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** Skill Registration
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#+begin_src lisp
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(defskill :passepartout-security-permissions
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:priority 600
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:trigger (lambda (ctx) (declare (ignore ctx)) nil))
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#+end_src
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* Test Suite
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#+begin_src lisp
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(eval-when (:compile-toplevel :load-toplevel :execute)
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(ql:quickload :fiveam :silent t))
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(defpackage :passepartout-security-permissions-tests
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(:use :cl :fiveam :passepartout)
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(:export #:permissions-suite))
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(in-package :passepartout-security-permissions-tests)
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(def-suite permissions-suite :description "Verification of Tool Permissions")
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(in-suite permissions-suite)
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(test test-permission-round-trip
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"Contract 1: permission-set stores a level; permission-get retrieves it."
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(permission-set "test-tool" :allow)
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(is (eq :allow (permission-get "test-tool")))
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;; Clean up
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(permission-set "test-tool" nil))
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(test test-permission-default
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"Contract 2: unregistered tools default to :ask."
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(is (eq :ask (permission-get "never-registered-tool-xyz"))))
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(test test-permission-case-insensitive
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"Contract 3: tool names are normalized to lowercase."
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(permission-set :CapitalTool :deny)
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(is (eq :deny (permission-get :capitaltool)))
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(permission-set "CapitalTool" nil))
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#+end_src
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