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aikido

pjt222
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This Claude Skill enables practice of Aikido, a defensive martial art focused on redirecting force and de-escalation. It teaches core techniques, safe falling (ukemi), and movement principles for handling aggression without unnecessary harm. Developers can use it to build skills in controlled resolution and maintaining calm under physical pressure.

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Claude Code

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主要方式
npx skills add pjt222/agent-almanac -a claude-code
插件命令备选方式
/plugin add https://github.com/pjt222/agent-almanac
Git 克隆备选方式
git clone https://github.com/pjt222/agent-almanac.git ~/.claude/skills/aikido

在 Claude Code 中复制并粘贴此命令以安装该技能

技能文档

Practice Aikido

Develop aikido practice rooted in centering, blending with incoming force, resolving conflict through controlled technique rather than opposing strength with strength.

When Use

  • Learning defensive martial art prioritizes de-escalation and controlled resolution
  • Developing ability to redirect aggression without causing unnecessary harm
  • Building safe falling skills (ukemi) applicable to any physical activity or emergency
  • Cultivating calm centeredness under physical pressure or confrontation
  • Complementing tai chi or meditation with partner-based martial practice (see tai-chi, meditate)
  • Training awareness and response to multiple simultaneous threats

Inputs

  • Required: Practice space with padded or yielding surface (tatami, judo mats, grass; avoid concrete)
  • Required: Comfortable clothing allowing full range of motion (gi preferred; loose exercise clothing acceptable)
  • Optional: Training partner (essential for techniques; solo practice covers centering, ukemi, movement)
  • Optional: Practice weapons (wooden: jo staff ~128cm, bokken sword ~102cm, tanto knife ~30cm)
  • Optional: Experience level (beginner, intermediate, advanced; default: beginner)
  • Optional: Available practice time (minimum 20 minutes; recommended 60-90 minutes)

Steps

Step 1: Ground and Center

Every aikido technique begins from centered state. Without center, technique becomes muscular struggle.

  1. Stand in hanmi (half-facing stance): one foot forward, feet roughly shoulder-width apart at 60-degree angle
  2. Bend knees slight — weight sinks toward one-point (seika tanden), located 5cm below navel
  3. Relax shoulders complete — let them drop away from ears
  4. Extend awareness outward while keep attention anchored at one-point
  5. Test your center: have partner push gentle on your chest
    • Resist with upper body? Not centered — relax and sink lower
    • Maintain stability without effort? Center established
  6. Practice weight underside: imagine heavy part of each arm is underside; let upper surface feel light and buoyant
  7. Extend ki: project calm, positive energy forward through fingertips — not tension, but focused intention

Got: Stable, relaxed stance where pushes absorbed through structure into ground rather than resisted by muscles. Quiet mind with broad awareness.

If fail: Stance feels rigid? You hold tension. Shake out arms and legs, take 5 deep breaths, re-establish from scratch. Pushes easily displace you? Lower center of gravity (bend knees more) and focus on one-point. Centering is skill that deepens over months — initial wobbliness normal.

Step 2: Master Ukemi (Falling and Rolling)

Ukemi is art of receiving technique safely. Most important skill in aikido — you will fall thousands of times.

Ukemi Progression:
┌────────────────────┬──────────────────────────┬───────────────────────────┐
│ Level              │ Technique                │ Practice Method            │
├────────────────────┼──────────────────────────┼───────────────────────────┤
│ 1. Backward fall   │ Sit down, roll back,     │ From seated, then squat,  │
│ (ushiro ukemi)     │ slap mat with both arms  │ then standing. Chin to    │
│                    │ at 45 degrees            │ chest — never hit head    │
├────────────────────┼──────────────────────────┼───────────────────────────┤
│ 2. Side fall       │ Fall to the side, arm    │ From kneeling, then       │
│ (yoko ukemi)       │ slaps mat, body in arc   │ standing. Land on the     │
│                    │ — not flat on the back   │ fleshy side, not hip bone │
├────────────────────┼──────────────────────────┼───────────────────────────┤
│ 3. Forward roll    │ Roll diagonally over     │ From kneeling, then       │
│ (mae ukemi)        │ shoulder: hand-forearm-  │ standing, then moving.    │
│                    │ shoulder-opposite hip    │ The line is diagonal,     │
│                    │                          │ never straight over spine │
├────────────────────┼──────────────────────────┼───────────────────────────┤
│ 4. Breakfall       │ High fall received with  │ Only after forward roll   │
│ (tobi ukemi)       │ a slap and roll at speed │ is completely smooth.     │
│                    │                          │ Build height gradually    │
└────────────────────┴──────────────────────────┴───────────────────────────┘

Key principles:

  1. Slap absorbs impact by spreading force across arm surface — time it to land just before body
  2. Tuck chin on every fall — head never contacts ground
  3. Exhale on impact; holding breath creates rigidity and increases injury risk
  4. Forward rolls should be round and smooth — thuds or flat spots? Body not curved enough
  5. Practice both sides: right shoulder forward and left shoulder forward

Got: After 2-3 months of regular practice, forward rolls smooth and quiet on both sides. Backward falls automatic (no fear response). Can be thrown at moderate speed without hesitation.

If fail: Forward rolls cause shoulder pain? Angle likely too steep (going over top of shoulder instead of across back diagonally). Have partner or instructor check line. Fear prevents commitment to roll? Return to kneeling version and build up gradually. Never force breakfall before forward roll is second nature.

Step 3: Practice Basic Techniques

Four foundational techniques address most common attack scenarios. Embody aikido's core principles.

Technique Selection by Attack:
┌─────────────────┬──────────────────┬──────────────────────────────────────┐
│ Attack          │ Technique        │ Principle                            │
├─────────────────┼──────────────────┼──────────────────────────────────────┤
│ Straight strike │ Irimi-nage       │ Enter behind the attack line, lead   │
│ (shomen-uchi)   │ (entering throw) │ attacker's head in a spiral, project │
├─────────────────┼──────────────────┼──────────────────────────────────────┤
│ Diagonal strike │ Shiho-nage       │ Redirect the attacking arm overhead  │
│ (yokomen-uchi)  │ (four-direction  │ in a spiral, control the wrist, cut  │
│                 │ throw)           │ down to throw in any direction       │
├─────────────────┼──────────────────┼──────────────────────────────────────┤
│ Wrist grab      │ Kote-gaeshi      │ Blend with the grab energy, apply    │
│ (katate-dori)   │ (wrist turn)     │ outward wrist rotation to unbalance  │
│                 │                  │ and project the attacker             │
├─────────────────┼──────────────────┼──────────────────────────────────────┤
│ Lapel/shoulder  │ Ikkyo            │ Control the elbow and wrist, pin     │
│ grab (ai-hanmi) │ (first teaching) │ the arm to the ground. Foundation    │
│                 │                  │ for all immobilizations              │
└─────────────────┴──────────────────┴──────────────────────────────────────┘

For each technique:

  1. Begin with attack at slow, cooperative speed
  2. Blend first: move your body off attack line (never block head-on)
  3. Connect: make contact with attacker's arm or body to feel their balance
  4. Redirect: use circular motion to guide attacker's energy into technique
  5. Complete: throw or pin with control — goal is to end encounter, not to injure
  6. Practice 10-20 repetitions per side, alternating roles (nage/tori throws, uke attacks and falls)
  7. Gradually increase speed and resistance as both partners gain proficiency

Got: Techniques feel smooth and circular. Attacker led rather than forced. At cooperative speed, both partners finish exchange safely and without strain.

If fail: Technique requires significant muscular effort? Blending incomplete — defender fighting attack instead of redirecting it. Return to moment of contact and practice initial blend in isolation. Attacker feels yanked or wrenched? Slow down and focus on leading with center, not pulling with hands.

Step 4: Develop Blending (Tai Sabaki)

Tai sabaki — body movement — is engine of aikido. Technique without movement is just wrestling.

  1. Irimi (entering): Step direct forward and past attacker, moving inside their reach
    • Practice: partner extends punch; step past it so you end behind their shoulder
  2. Tenkan (turning): Pivot 180 degrees on front foot, redirecting attacker's line
    • Practice: partner grabs your wrist; pivot smooth so you face same direction they do
  3. Irimi-tenkan (enter and turn): Combine entering with pivot — most common movement
    • Practice: enter past attack, then pivot to control attacker from behind
  4. Kaiten (rotation): Full body rotation to generate circular force for throws
    • Practice: combined with shiho-nage and other rotational techniques
  5. Practice all movements solo first: step-pivot, step-pivot, step-pivot across mat
  6. Then with partner: focus on matching timing to attack — move as they commit, not before or after

Got: Movement fluid, centered, timed to attack. Defender never squared up facing attack force — always angled off line.

If fail: Timing off (arriving too early or too late)? Practice with very slow, telegraphed attack. Defender should move at same moment attack commits — this is "aiki" timing. Turns feel clumsy? Practice tenkan as standalone drill: 100 pivots per session builds smooth, automatic rotation.

Step 5: Train Randori (Multiple Attackers)

Randori develops awareness and decisiveness needed when overwhelmed. Where principles truly tested.

  1. Begin with two attackers at slow speed — they take turns (not simultaneous)
  2. Core principle: never stop moving. Stationary means surrounded
  3. Use each attacker as shield against others: redirect one into path of another
  4. Move to open space — never back into corner or wall
  5. Extend awareness in all directions; do not fixate on one attacker (see mindfulness)
  6. Apply simple, reliable techniques — complex techniques fail under pressure
  7. Progress to three attackers, then four, increasing speed gradually
  8. Randori not about defeating every attacker — about maintaining center and freedom of movement

Got: Ability to stay calm and mobile while being approached from multiple angles. Techniques applied fluidly without freezing or tunnel vision.

If fail: Panic sets in? Return to two slow attackers. Randori anxiety normal and decreases with exposure. Techniques collapse under pressure? Simplify: focus on irimi (entering) and tenkan (turning) only, ignoring throws entirely. Movement and positioning more important than technique execution in randori.

Step 6: Integrate Weapons Awareness

Weapons training deepens understanding of distance, timing, line — principles that improve empty-hand technique.

  1. Jo (staff): Practice 31-count jo kata for line and extension
    • Jo teaches maintaining distance and controlling space
    • Partner practice: jo-dori (staff taking) — disarm staff attack with empty hands
  2. Bokken (wooden sword): Practice suburi (cutting exercises) for precision and center line awareness
    • Sword teaches commitment: every cut must follow precise line
    • Partner practice: kumitachi (paired sword forms) for timing and distance
  3. Tanto (wooden knife): Practice tanto-dori (knife defense)
    • Knife teaches respect for close-range danger
    • Always redirect weapon hand — never reach for blade
  4. Weapons principles that transfer to empty-hand:
    • Ma-ai (proper distance): too close invites weapon; too far wastes response
    • Shomen (center line): all attacks and defenses relate to vertical center line
    • Zanshin (continuing awareness): remain alert after technique completes

Got: Weapons practice clarifies why tai sabaki, timing, distance matter. Empty-hand technique improves as body movement becomes more precise.

If fail: Weapons feel awkward or disconnected from empty-hand practice? Focus on suburi (solo cutting exercises) for one month before adding partner work. Partner practice becomes competitive or dangerous? Slow down immediate — wooden weapons can cause real injury at speed.

Step 7: Apply Principles Off the Mat

Aikido's value extends beyond dojo into daily interaction and conflict resolution.

  1. In confrontation, apply irimi-tenkan mental: move toward person's concern (enter), then redirect conversation to common ground (turn)
  2. In physical space, maintain awareness of position, exits, others' body language (see mindfulness)
  3. Practice "receiving" criticism or aggression without resistance — acknowledge energy, then redirect
  4. Cultivate habit of centering before stressful situations: drop awareness to one-point, relax shoulders, extend calm intention
  5. Regular practice schedule:
    • Solo (daily, 15-30 min): centering, ukemi rolls, tai sabaki, weapons suburi
    • Partner (2-3x weekly, 60-90 min): techniques, randori, weapons partner work
  6. Complement with tai chi for internal energy development (see tai-chi)
  7. Complement with meditation for mental stillness and equanimity (see meditate)

Got: Aikido principles — blending, redirecting, centering — become natural responses to conflict in daily life. Physical practice maintains and deepens martial skill.

If fail: Daily practice lapses? Focus on smallest unit: 5 minutes of centering and 20 forward rolls. Consistency matters more than duration. Martial aspects feel disconnected from daily life? Reflect on how each technique is metaphor: irimi is facing problem direct; tenkan is changing perspective; ukemi is recovering from setbacks.

Checks

  • Centered stance absorbs moderate pushes without muscular resistance
  • Forward rolls smooth, quiet, practiced on both sides
  • At least four basic techniques can be performed cooperatively with partner
  • Tai sabaki (irimi, tenkan, irimi-tenkan) practiced both solo and with partner
  • Randori with two slow attackers can be sustained for 60 seconds without freezing
  • At least one weapon (jo, bokken, or tanto) practiced in solo kata
  • Practice includes both solo and partner components regular

Pitfalls

  • Using muscle instead of blending: Technique requires strength? Timing or angle wrong. Relax, re-enter, let attacker's energy do work. Aikido's power comes from redirecting force, not generating it
  • Neglecting ukemi: Students who avoid falling avoid learning. Ukemi IS aikido — ability to receive force safely. Practice every session, especially at start
  • Fear of commitment: Half-hearted entering (irimi) puts you in worst position — too close to evade, too far to control. Once you decide to enter, commit fully to moving past attack
  • Fixating on one attacker: In randori and in life, tunnel vision dangerous. Keep soft, wide awareness. Peripheral vision detects motion before focused vision does
  • Training only with compliant partners: Beginners need cooperation, intermediate students should gradually increase resistance. Technique only works on cooperative partner is incomplete

See Also

  • tai-chi — complementary internal martial art; shares principle of yielding to overcome force, with emphasis on solo cultivation
  • mindfulness — defensive situational awareness provides perceptual foundation for martial readiness and conflict avoidance
  • meditate — seated meditation develops centered, equanimous mind state aikido requires under pressure
  • heal — understanding body mechanics from aikido practice informs first aid and bodywork approaches
  • redirect — AI self-application variant; maps aikido blending and redirection to handling conflicting demands and tool failures

GitHub 仓库

pjt222/agent-almanac
路径: i18n/caveman/skills/aikido
0
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