Skill Lifecycle

Provenance, usage telemetry, recoverable archive, and rollback for agent-created skills

Agent-created skills carry provenance metadata and usage telemetry that lets you track, archive, restore, and roll back skills across their entire lifetime.

from praisonaiagents import Agent

agent = Agent(
    name="Self-Improving Agent",
    instructions="Create skills when you learn something new; archive stale ones.",
    tools=["skill_manage", "skills_list"],
)
agent.start("Learn how to summarise weekly reports, then save that as a skill.")

The user teaches a workflow; lifecycle tools track creation, usage, archive, and rollback.

Quick Start

1. Create a Skill with Provenance

   from praisonaiagents import SkillManager
   
   mgr = SkillManager()
   mgr.discover()
   
   # agent_created=True stamps frontmatter with provenance fields
   result = mgr.create_skill(
       "csv-analysis",
       "# CSV Analysis\n1. Load with pandas\n2. Clean nulls\n3. Summarise",
       agent_created=True
   )
   print(result)
   # {"success": True, "skill": "csv-analysis", "path": "/path/to/skill"}

   The resulting SKILL.md frontmatter is automatically stamped:

   ---
   name: csv-analysis
   description: Generated skill
   agent-created: true
   created-at: "2024-06-24T10:00:00Z"
   use-count: 0
   last-used: null
   patch-count: 0
   ---

2. Telemetry Updates on Use

   # Each invoke() or get_instructions() call increments use-count and sets last-used
   body = mgr.invoke("csv-analysis", raw_args="sales.csv")
   
   # SKILL.md frontmatter is updated in place:
   # use-count: 1
   # last-used: "2024-06-24T10:05:00Z"

3. Recoverable Delete and Restore

   # delete_skill archives by default — the skill is NOT gone
   mgr.delete_skill("csv-analysis")
   print(mgr.list_archived_skills())  # ["csv-analysis"]
   
   # Bring it back
   mgr.restore_skill("csv-analysis")

4. Rollback a Broken Edit

   # edit_skill and patch_skill save a snapshot before mutating
   mgr.edit_skill("csv-analysis", "# CSV Analysis v2\n... broken content ...")
   
   # Undo the last change
   result = mgr.rollback_skill("csv-analysis")
   print(result)
   # {"success": True, "skill": "csv-analysis"}

How It Works

Frontmatter Fields

Five fields are added to SKILL.md frontmatter when agent_created=True is passed to create_skill, or set manually. The parser accepts both hyphen (agent-created) and underscore (agent_created) forms.

Backward-compatible: Skills without these fields parse fine — all fields default to their zero/None values.

Telemetry only counts successful activations. If get_instructions() returns None because the skill failed to activate, use-count and last-used are not updated. A broken skill stays at use-count: 0, keeping telemetry trustworthy.

idle_days Helper

SkillProperties.idle_days returns the number of days since the skill was last meaningfully active.

from praisonaiagents import SkillManager

mgr = SkillManager()
mgr.discover()

skill = mgr.get_skill("csv-analysis")
days = skill.properties.idle_days
# Returns days since last_used, or since created_at if the skill has never been used.
# Returns None when neither last_used nor created_at is set.

if days is not None and days > 30:
    print(f"csv-analysis has been idle for {days:.1f} days — consider archiving")

idle_days exposes the data for lifecycle decisions. The policy (what “stale” threshold to apply, when to auto-archive) lives in plugin code, not in core.

Archive / Restore

Directory Layout

~/.praisonai/
├── skills/               # active skills
│   ├── csv-analysis/
│   │   ├── SKILL.md
│   │   └── .skill.bak    # rollback snapshot (after edit/patch)
│   └── weekly-summary/
│       └── SKILL.md
└── skills_archive/       # archived skills (sibling of skills/)
    ├── csv-analysis/
    └── old-formatter.20240624153012/  # collision-suffixed

The archive store is always the sibling directory of the first active skills directory (e.g., <first_skill_dir>/../skills_archive/).

Collision Behaviour

If a skill with the same name already exists in skills_archive/ when archiving, a UTC timestamp suffix is appended: `<name>.

`. This prevents overwriting a previously archived version.

In-Memory State

archive_skill() removes the skill from the in-memory index immediately. After restore_skill(), call discover() or use the returned path to add it back manually if needed in the same session.

from praisonaiagents import SkillManager

mgr = SkillManager()
mgr.discover()

# Archive
mgr.archive_skill("csv-analysis")
print("csv-analysis" in mgr.skill_names)  # False — removed from index

# Restore
mgr.restore_skill("csv-analysis")
mgr.discover()                             # re-index after restore
print("csv-analysis" in mgr.skill_names)  # True

Rollback

rollback_skill() is a single-step undo of the most recent edit_skill() or patch_skill() call.

What saves a snapshot:

• edit_skill(name, content) — always saves prior SKILL.md
• patch_skill(name, old, new) when file_path is None or "SKILL.md" — saves prior SKILL.md

What does NOT save a snapshot:

• patch_skill(name, old, new, file_path="scripts/helper.py") — modifying a non-SKILL.md file does not create a .skill.bak

Error when no snapshot exists:

result = mgr.rollback_skill("csv-analysis")
# {"success": False, "error": "No rollback snapshot for skill 'csv-analysis'"}

Common Patterns

Self-Improving Agent Loop

from praisonaiagents import Agent, SkillManager

# Agent creates and improves skills over time
agent = Agent(
    name="Self-Improving Agent",
    instructions="""
    When you learn something new, create a skill for it.
    When a skill becomes outdated, archive it.
    """,
    tools=["skill_manage", "skills_list"]
)

# The agent's skill_manage calls automatically:
# 1. stamp created-at, use-count, patch-count on creation
# 2. increment use-count on each use
# 3. archive (not delete) when retiring a skill
agent.start("Learn how to summarise weekly reports, then use that knowledge.")

Safe Edit-with-Rollback Wrapper

from praisonaiagents import SkillManager

mgr = SkillManager()
mgr.discover()

def safe_edit(skill_name: str, new_content: str) -> bool:
    result = mgr.edit_skill(skill_name, new_content)
    if not result["success"]:
        print(f"Edit failed: {result['error']}")
        return False

    # Verify the skill still activates correctly
    instructions = mgr.get_instructions(skill_name)
    if instructions is None:
        print("Skill broken after edit — rolling back")
        mgr.rollback_skill(skill_name)
        return False

    return True

safe_edit("csv-analysis", "# CSV Analysis v2\nImproved steps...")

Inspect Telemetry from a Curator Script

from praisonaiagents import SkillManager

mgr = SkillManager()
mgr.discover()

STALE_THRESHOLD_DAYS = 30

for skill in mgr.skills:
    props = skill.properties
    idle = props.idle_days

    print(f"{props.name}:")
    print(f"  agent-created : {getattr(props, 'agent_created', False)}")
    print(f"  use-count     : {getattr(props, 'use_count', 0)}")
    print(f"  last-used     : {getattr(props, 'last_used', None)}")
    print(f"  patch-count   : {getattr(props, 'patch_count', 0)}")
    print(f"  idle-days     : {idle}")

    if idle is not None and idle > STALE_THRESHOLD_DAYS:
        print(f"  → STALE: archiving")
        mgr.archive_skill(props.name)

Best Practices

Related